Driving device and camera

ABSTRACT

There are provided a driving device and a camera which are compact in size and inexpensive even with the use of two motors, which allow relevant mechanisms to be laid out freely to thereby simplify motor controlling sequences, and which ensure positive power transmission operations even upon abnormal load change during film rewinding. First and second planetary mechanisms are responsive to rotation of a first motor in a desired direction, for revolving in a direction corresponding to the desired direction to transmit a driving force of the first motor. A first driving system is disposed to have the driving force of the first motor transmitted thereto via the first planetary mechanism when the first motor rotates in a first direction. A second driving system is disposed to have the driving force of the first motor transmitted thereto via the first planetary mechanism when the first motor rotates in a second direction. A third driving system is disposed to have the driving force of the first motor transmitted thereto via the second planetary mechanism when the first motor rotates in the first direction. A switching mechanism is responsive to rotation of the first motor in the desired direction, for switching a transmission path for the driving force of the first motor by inhibiting one of the first and second planetary mechanisms from revolving, and for causing the other of the first and second planetary mechanisms to transmit the driving force of the first motor through a transmission path selected by the switching. The first and second planetary mechanisms have first and second restraint members, respectively, for restraining the first and second planetary mechanisms from revolving simultaneously by inhibiting concurrence of engagement of the first planetary mechanism with the second driving system and engagement of the second planetary mechanism with the third driving system.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a driving device and a camerathat drive a plurality of mechanisms using a plurality of motors asdriving sources.

[0003] 2. Description of the Related Art

[0004] Some single-lens reflex cameras use motors as driving sources todrive a mirror driving system, a shutter charge driving system, a filmwinding or rewinding driving system, an electronic flash popping-up or-down driving system, and the like.

[0005] For example, a camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 3-75626 incorporates two motors disposed suchthat the first motor is rotated in one direction to wind a film and inthe other direction to drive a mirror and a shutter, whereas the secondmotor is rotated in one direction to rewind the film and in the otherdirection to drive an electronic flash.

[0006] Further, various cameras have been proposed which use a singlemotor as a driving source to feed the film, charge the shutter, drivethe mirror, and so on.

[0007] For example, a camera proposed by Japanese Laid-Open PatentPublication (Kokai) No. 1-202731 employs a preliminary winding systemwherein the camera main body incorporates a single motor disposed suchthat when a user opens a rear cover, charges a film cartridge into thecamera, and then closes the rear cover, a full-amount winding spoolwinds a film in the film cartridge to set the camera into aphotographing standby state. Thereafter, in photographing, this motor isused to rewind the film, charge the shutter, and drive the mirrorthrough switching of a planetary clutch.

[0008] In this camera, when the motor is rotated in one direction, theplanetary clutch is connected to a first transmission system on a filmwinding side, and as the motor continues to rotate in the samedirection, the film is wound. Once the winding operation is completed,the motor is rotated in the other direction to connect the planetaryclutch to a second transmission system. When the motor is rotated in theother direction with the planetary clutch connected to the secondtransmission system, a series of photographing operations including filmrewinding, mirror pop-up and -down, and shutter charging are performedwhile a rotary cam member makes a turn.

[0009] Further, a motor driving device proposed in Japanese Laid-OpenPatent Publication (Kokai) No. 1-287648 drives a plurality of planetaryclutch mechanisms (planetary clutches) using a single motor. The motoris rotated in one direction to cause a first planetary clutch to performa switching operation to select a driving system to which power istransmitted when the motor rotates in the other direction. Once thedriving system is selected in this manner, the motor is rotated in theother direction to transmit motor power to the selected driving system.

[0010] Moreover, a camera has been proposed in Japanese Laid-Open PatentPublication (Kokai) No. 8-328094, in which a plurality of planetaryclutch mechanisms (planetary clutches) are driven by a single motor. Themotor is rotated in one direction to perform mirror driving and shuttercharge driving and perform a switching operation to select one planetaryclutch for power transmission, and is rotated in the other direction totransmit its driving power to one of driving mechanisms for filmwinding, film rewinding, and electronic flash pop-up to prepare forphotographing, which is the destination of power transmission from theselected planetary clutch.

[0011] Further, a camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 7-270877 uses a motor that drives a taking lensbarrel to distribute power to other motors.

[0012] Moreover, a camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 61-269129 includes a film winding mechanismhaving two types of gear ratios for high-speed winding and low-speedwinding, which are switched depending on load, power supply, or the likeor to switch from the low-speed winding to the high-speed-winding forpreliminary winding.

[0013] However, in the camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 3-75626, the two motors each carry our the filmdriving, mirror driving, and shutter charge driving, but since thesedriving systems undergo relatively heavy driving loads, large-sizedmotors of high power are employed for these motors if a camera having ahigh continuous photographing speed is to be provided. Thus, the camerawill be expensive and large in size.

[0014] Further, the camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 2-202731 uses only one motor, thus making itpossible to reduce its own size. The use of the preliminary film windingsystem, however, requires a rear cover interlocking mechanism and thelike, thereby hindering the entire system or layout from being designedfreely.

[0015] Moreover, the motor driving device proposed in Japanese Laid-OpenPatent Publication (Kokai) No. 1-287648 also uses only one motor, but itrequires as many planetary clutches as the number of the driving systemsto which power is transmitted, thus requiring a large-sized mechanism.Further, since one operation is completed by a set of rotations of themotor in one and the other directions, a complicated sequence isrequired for a series of plural operations. If this motor driving deviceis applied to a camera, the continuous photographing speed will be low.

[0016] Furthermore, the camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 8-328094 uses only one motor, but the cam memberfor causing the series of photographing operations including mirrordriving and shutter charge driving to be performed during one rotationthereof is provided with phases for phase indexing that allow theelectronic flash to pop up after photographing operation has beencompleted. Consequently, this camera is not optimal for increasing thecontinuous photographing speed.

[0017] Further, the camera proposed in Japanese Laid-Open PatentPublication (Kokai) No. 7-270877 determines driving force transmittingpaths for the motors other than the one for driving the lens barrel,based on a position in which the lens barrel is stopped, therebyhindering the driving force transmitting paths used from being selectedfreely.

[0018] With respect to the film winding operation, which significantlyaffects the speed of the continuous photographing operation, the loadrequired for film winding varies with the type of the commerciallyavailable film. Further, at low temperature, the film winding loadincreases, so that the gear ratio of the film winding mechanism must beset to such a gear ratio as can deal with a high load of about 800 g.Consequently, the film winding speed necessarily decreases in normalphotographing.

[0019] Furthermore, in all the above conventional constructions, thegear ratio of the film winding mechanism is set to a single gear ratio,thus limiting an increase in the continuous photographing speed.

[0020] To cope with this problem, the camera proposed in JapaneseLaid-open Patent Publication (Kokai) No. 61-269129 is provided with awinding mechanism having two gear ratios for high and low speeds.However, it requires an exclusive motor for winding the film. Further,other relatively large-sized motors are required for driving mechanismsfor mirror driving, shutter charging, film rewinding, and others whichdeal with relatively heavy loads. Thus, the camera has to be large insize.

[0021] Further, in a power distribution mechanism using a plurality ofplanetary mechanisms driven by a single motor as a driving source, ifthe motor is stopped or suddenly decelerated upon a sudden change in theload upon a planetary mechanism which is being revolved whiletransmitting power by the motor rotating in one direction, the otherplanetary mechanism(s), which is(are) then held out of its(their)engaged or meshing position(s) through a revolution-blocking member orthe like, can make a revolving motion(revolving motions)in a directionin which it(they) is(are) caused to revolve when the motor rotates inthe other direction, resulting in a behavior which is different from aproper behavior. For example, in the camera proposed in JapaneseLaid-Open Patent Publication (Kokai) No. 8-328094, if such an abnormaloperation occurs that the film becomes taut or tensioned duringrewinding, the other planetary clutch than the one that is transmittingpower for the film rewinding is caused to rebound and revolve in thedirection of the mirror being driven and the shutter being charged,which is opposite to the direction in which the other planetary clutchis blocked from revolving, so that it is brought into an engagedposition.

SUMMARY OF THE INVENTION

[0022] It is a first object of the present invention to provide adriving device and a camera which are compact in size and inexpensiveeven with the use of two motors, which allow relevant mechanisms to belaid out freely to thereby simplify motor controlling sequences, andwhich ensure positive power transmission operations even upon abnormalload change during film rewinding.

[0023] To attain the above object, in a first aspect of the presentinvention, there is provided a driving device provided in an apparatusfor driving a plurality of driving systems by means of motors as drivingsources, comprising a first motor, first and second planetary mechanismsresponsive to rotation of the first motor in a desired direction, forrevolving in a direction corresponding to the desired direction totransmit a driving force of the first motor, a first driving systemdisposed for engagement with the first planetary mechanism to have thedriving force of the first motor transmitted thereto via the firstplanetary mechanism when the first motor rotates in a first direction, asecond driving system disposed for engagement with the first planetarymechanism to have the driving force of the first motor transmittedthereto via the first planetary mechanism when the first motor rotatesin a second direction, a third driving system disposed for engagementwith the second planetary mechanism to have the driving force of thefirst motor transmitted thereto via the second planetary mechanism whenthe first motor rotates in the first direction, and a switchingmechanism responsive to rotation of the first motor in the desireddirection, for switching a transmission path for the driving force ofthe first motor by inhibiting one of the first and second planetarymechanisms from revolving, and for causing the other of the first andsecond planetary mechanisms to transmit the driving force of the firstmotor through a transmission path selected by the switching, wherein thefirst and second planetary mechanisms have first and second restraintmembers, respectively, for restraining the first and second planetarymechanisms from revolving simultaneously by inhibiting concurrence ofengagement of the first planetary mechanism with the second drivingsystem and engagement of the second planetary mechanism with the thirddriving system.

[0024] To attain the above object, in a second aspect of the presentinvention, there is provided a camera having a plurality of drivingsystems driven by means of motors as driving sources, comprising a firstmotor, first and second planetary mechanisms responsive to rotation ofthe first motor in a desired direction, for revolving in a directioncorresponding to the desired direction to transmit a driving force ofthe first motor, a first driving system disposed for engagement with thefirst planetary mechanism to have the driving force of the first motortransmitted thereto via the first planetary mechanism when the firstmotor rotates in a first direction, a second driving system disposed forengagement with the first planetary mechanism to have the driving forceof the first motor transmitted thereto via the first planetary mechanismwhen the first motor rotates in a second direction, a third drivingsystem disposed for engagement with the second planetary mechanism tohave the driving force of the first motor transmitted thereto via thesecond planetary mechanism when the first motor rotates in the firstdirection, and a switching mechanism responsive to rotation of the firstmotor in the desired direction, for switching a transmission path forthe driving force of the first motor by inhibiting one of the first andsecond planetary mechanisms from revolving, and for causing the other ofthe first and second planetary mechanisms to transmit the driving forceof the first motor through a transmission path selected by theswitching, wherein the first and second planetary mechanisms have firstand second restraint members, respectively, for restraining the firstand second planetary mechanisms from revolving simultaneously byinhibiting concurrence of engagement of the first planetary mechanismwith the second driving system and engagement of the second planetarymechanism with the third driving system.

[0025] Preferably, a fourth driving system is disposed to have thedriving force of the first motor transmitted thereto via the secondplanetary mechanism when the first motor rotates in the seconddirection.

[0026] Also preferably, an actuator is provided for driving theswitching mechanism to cause the switching mechanism to switch thetransmission path for the driving force of the first motor.

[0027] More preferably, the actuator comprises a second motor having asmaller output than the first motor, the driving device including athird planetary mechanism for transmitting a driving force of the secondmotor, and wherein the switching mechanism is actuated by the drivingforce of the second motor transmitted through the third planetarymechanism.

[0028] Further preferably, a fifth driving system is disposed to havethe driving force of the second motor transmitted thereto via the thirdplanetary mechanism when the second motor rotates in the seconddirection.

[0029] Preferably, the second driving system and the third drivingsystem cause operations of a device that performs a predetermined kindof operation, in opposite directions to each other.

[0030] In a preferred form of the present invention, the switchingmechanism selectively switches between a state in which the firstplanetary mechanism is permitted to be drivingly connected to the firstdriving system and the second driving system while the second planetarymechanism is inhibited from being connected to the third driving systemand the fourth driving system, a state in which the first planetarymechanism is permitted to be drivingly connected to the first drivingsystem and the second planetary mechanism is permitted to be drivinglyconnected to the fourth driving system while the first planetarymechanism is inhibited from being connected to the second driving systemand the second planetary mechanism is inhibited from being connected tothe third driving system, and a state in which the second planetarymechanism is permitted to be drivingly connected to the third drivingsystem while the first planetary mechanism is inhibited from beingconnected to the first driving system.

[0031] Preferably, a sun gear member is disposed to be driven by thefirst motor, and the first and second planetary mechanisms are disposedto revolve around the sun gear member independently of each other, thefirst and second planetary mechanisms having respective revolving shaftshaving bearing portions and being concentrically arranged, the first andsecond restraint members being provided on the bearing portions.

[0032] In a preferred form of the camera according to the presentinvention, there are provided a mirror disposed to advance into andrecede from a photographic optical path, and a shutter, and the firstdriving system comprises a driving system for driving the mirror, andfor driving charging of the shutter, the second and fourth drivingsystems comprise film winding driving systems that wind a film atdifferent speeds from each other, and the third driving system comprisesa film rewinding driving system.

[0033] With the arrangement of the present invention, the first motordrives all the driving systems that cause execution of operations suchas the photographing and film feeding operations for the camera, whichrequire relatively high driving loads, and the second motor drives theswitching mechanism and driving systems that cause execution ofoperations other than the photographing and film feeding operations,which require relatively light driving loads. As a result, the secondmotor can be selected to have a lower output (and a smaller size) thanthe first motor. Besides, two motors are used, so that the mechanismscan be laid out more freely and a relatively smaller number of planetarymechanisms are required than when only one motor is used. As a result,the entire size of the apparatus or camera and its costs can be reduced.

[0034] Furthermore, since one apparatus or camera operation can beperformed by rotation of the motor in only one direction, the motorcontrolling sequence can be simplified compared to a case whererotations in both directions are combined together to perform oneoperation.

[0035] Further, the second and fourth driving systems can be operated toperform the same apparatus operation (for example, the film windingoperation for the camera) at different speeds, optimal and efficientdriving operations can be performed depending on the state of the powersupply, driving loads, or the like. In particular, in the camera, thecontinues photographing frame speed can be selected to a desired speed.In any case, the photographing operation can be performed by rotatingonly one motor in the normal direction alone or in the reverse directionalone.

[0036] Furthermore, even if the driving device or the camera isconfigured such that the second and third driving systems causeoperations of the same device that performs a predetermined kind ofoperation, in opposite directions to each other (for the film windingoperation and the film rewinding operation of the camera, respectively),since concurrence of engagement of the first planetary mechanism withthe second driving system and engagement of the second planetarymechanism with the third driving system is inhibited, a positive andreliable operation of the driving device or the camera can be ensured.

[0037] The above and other objects, features, and advantages of thepresent invention will be apparent from the following specification anddrawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0038]FIG. 1 is a perspective view schematically showing an entireinternal mechanism of a single-lens reflex camera as a camera accordingto an embodiment of the present invention;

[0039]FIG. 2 is a perspective view showing the construction of a drivingunit of the internal mechanism of FIG. 1;

[0040]FIG. 3 is a perspective view of the construction of a mirror boxunit of the internal mechanism of FIG. 1;

[0041]FIG. 4 is a side view showing the construction of the mirror boxunit of FIG. 3;

[0042]FIG. 5 is a view, partly in section, of the construction of anelectronic flash popup mechanism of the internal mechanism of FIG. 1;

[0043]FIG. 6A to 6O is a view showing the details of parts constitutingthe electronic flash popup mechanism of FIG. 5;

[0044]FIGS. 7A to 7E are views useful in explaining the operation of aswitching mechanism of the internal mechanism of FIG. 1;

[0045]FIGS. 8A to 8E are views useful in explaining the operation of theswitching mechanism of the internal mechanism of FIG. 1;

[0046]FIGS. 9A to 9B are views useful in explaining the operation of theswitching mechanism of the internal mechanism of FIG. 1;

[0047]FIGS. 10A to 10D are views useful in explaining the operation ofthe electronic flash popup mechanism of FIG. 5;

[0048]FIGS. 11A to 11C are views useful in explaining the operation ofthe electronic flash popup mechanism of FIG. 5;

[0049]FIG. 12 is a block diagram showing the construction of an electriccircuit of the camera;

[0050]FIGS. 13A and 13B is a flow chart of a film automatic loadingprocess executed by a CPU shown in FIG. 12;

[0051]FIG. 14 is a flow chart of the film automatic loading processexecuted by the CPU shown in FIG. 12;

[0052]FIG. 15 is a flow chart of a release process executed by the CPUshown in FIG. 12;

[0053]FIG. 16 is a flow chart of a continued part of the release processof FIG. 15;

[0054]FIGS. 17A and 17B is a flow chart of a film winding processexecuted by the CPU shown in FIG. 12;

[0055]FIG. 18 is a flow chart of an electronic flash popping-up processexecuted by the CPU shown in FIG. 12;

[0056]FIG. 19 is a flow chart of a film rewinding process executed bythe CPU shown in FIG. 12;

[0057]FIG. 20 is a flow chart of a continued part of the film rewindingprocess of FIG. 19;

[0058]FIGS. 21A and 21B are views showing the operation of the internalmechanism of FIG. 1;

[0059]FIGS. 22A and 22B are views showing the operation of the internalmechanism of FIG. 1;

[0060]FIG. 23 is a view showing the operation of the internal mechanismof FIG. 1;

[0061]FIG. 24 is a view showing the operation of the internal mechanismof FIG. 1; and

[0062]FIG. 25 is a view showing the operation of an internal mechanismof a conventional single-lens reflex camera.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0063] The present invention will be described below in detail withreference to the drawings showing a preferred embodiment thereof.

[0064] FIGS. 1 to 6 show the construction of an internal mechanism of asingle-lens reflex camera as a camera according to an embodiment of thepresent invention. FIG. 1 is a perspective view schematically showingthe entire internal mechanism, and FIGS. 2 and 3 are perspective viewsshowing units constituting the internal mechanism shown in FIG. 1.Further, FIG. 4 is a side view showing the construction of a mirror boxunit, shown in FIG. 3, and FIG. 5 is a partial sectional view showingthe construction of an electronic flash popup mechanism. Furthermore,FIG. 6A to 60 is a view showing the details of parts constituting theelectronic flash popup mechanism.

[0065] In FIG. 1, reference numeral 1 denotes a camera main body whichhas a driving unit D mounted on a bottom surface thereof to cause somecamera operations to be performed, including photographing operationssuch as a mirror driving operation, a shutter charging operation, andfilm winding and rewinding operations, as well as a film feedingoperation. Further, the camera main body 1 has a shutter unit S and amirror box unit MB mounted on an aperture front surface thereof.

[0066] First, in the driving unit D shown in FIG. 2, reference numeralM1 denotes a first motor which is a large-sized core-less motor of arelatively high output as a driving source for causing relatively highdriving load-camera operations to be performed, including a film feedingoperation, a mirror driving operation, and a shutter charge drivingoperation. The first motor M1 has a pulley 2 secured to an output shaftthereof.

[0067] Reference numeral 3 denotes a timing belt. Reference numeral 4denotes a gear having a pulley on one side thereof and a gear on theother side thereof and to which rotation of the pulley 2 is transmittedby the timing belt 3.

[0068] Reference numeral 5 denotes a sun gear which has a larger-sizedgear portion meshing with the gear 4 and smaller-sized gear portionsformed on opposite sides of the larger-sized gear portion, as shown inFIG. 6B. One of the smaller-sized gear portions meshes with a planetarygear 6 constituting a first planetary clutch (first planetary mechanism)together with a planetary lever 7, whereas the other smaller-sized gearportion meshes with a planetary gear 8 constituting a second planetaryclutch (second planetary mechanism) together with a planetary lever 9.

[0069] The planetary gear 6 is supported by the planetary lever 7 so asto revolve around one of the smaller-sized gear portions of the sun gear5. As shown in FIG. 6A, the planetary lever 7 is provided with stopperportions 7 a and 7 b for hindering the revolution of a first switchinglever 18, and a projection 7 c formed on a bearing portion of arevolving shaft thereof, described later. Further, the planetary gear 8is supported by the planetary lever 9 so as to revolve around the othersmaller-sized gear portion of the sun gear 5. The planetary lever 9 isprovided with stopper portions 9 a and 9 b for hindering the revolutionof a first switching lever 19, and a projection 9 c formed on a bearingportion of a revolving shaft thereof, described later. The planetarylever 7 and the planetary lever 9 have their revolving shaftsconcentrically secured to a rotary shaft of the sun gear 5. Theprojection 7 c and the projection 9 c are disposed such that when theplanetary levers 7 and 9 revolve in the same direction to transmitdriving power, they do not act upon each other, whereas when they haverevolved in different directions through a certain angle, they act torestrain each other from revolving. Details of this operation will bedescribed in a description of the operation of the internal mechanism ofthe camera, given later.

[0070] Reference numeral 10 denotes a winding transmitting gearcomprised of three gear portions. When the planetary gear 6 revolved byrotation of the first motor M1 in a second direction (for example, aforward direction) is brought into mesh with a gear portion 10 a, therotation of the first motor M1 is transmitted to the gear portion 10 a.Further, when the planetary gear 8 revolved by the rotation of the firstmotor M1 in the second direction is brought into mesh with the gearportion 10 b, the rotation of the first motor M1 is transmitted to thegear portion 2 b.

[0071] The gear portion 10 b has more teeth than the gear portion 10 a.The rotations of the first motor M1 transmitted to the gear portions 10a and 10 b are transmitted to film winding driving systems (second andfourth driving systems) via the gear portion 10 c. The film windingdriving system including the gear portion 10 a corresponds to a firstwinding driving system set forth in relevant claims, and the filmwinding driving system including the gear portion 10 b corresponds to asecond winding driving system set forth in relevant claims.

[0072] Reference numeral 11 denotes a spool for winding a film drawn outfrom a film cartridge, not shown, and having a gear portion 11 a meshingwith the gear portion 10 c of the winding transmitting gear 10.Accordingly, when the first motor M1 rotates in a first direction,rotation of the first motor M1 is transmitted to the spool 11 via theplanetary gear 6 or 8 and the winding transmitting gear 10, torotatively drive the spool 11.

[0073] The planetary gears 6 and 8 are selectively meshed with thewinding transmitting gear 10 by a switching mechanism, described later.However, the gear ratio (first reduction ratio) with which the planetarygear 6 meshes with the gear portion 10 a is smaller than the gear ratio(second reduction ratio) with which the planetary gear 8 meshes with thegear portion 10 b, and causes the spool 11 to rotate at a higher speed.In the present embodiment, the gear ratio with which the planetary gear6 meshes with the gear portion 10 a is set at 1:24, whereas the gearratio with which the planetary gear 8 meshes with the gear portion 10 bis set at 1:42.

[0074] Reference numeral 12 denotes a rewinding transmitting gear. Whenthe planetary gear 8 revolved by rotation of the first motor M1 in thefirst direction (for example, backward rotation) is brought into meshwith the rewinding transmitting gear 12, the rotation of the first motorM1 is transmitted to a film rewinding driving system (third drivingsystem). Further, rotation of the rewinding transmitting gear 12 istransmitted to gears 13 and 14.

[0075] Reference numeral 15 denotes a gear meshing with the gear 14 andhaving a pulley on one side thereof around which a timing belt 16 iswound. Thus, when rotation of the first motor M1 is transmitted from thegear 14 to the gear 15, it is transmitted to a rewinding fork unit 22,described later, via the timing belt 16.

[0076] Reference numeral 17 denotes a bottom board to which the firstmotor M1 is fixed and on which the gears 4, 5 and 10, the spool 11 andthe gears 12 to 15 are rotatably supported.

[0077] Reference numeral 18 is a first switching lever rotatablysupported on the bottom board 17 and having arms 18 a and 18 b and ashaft 18 c as shown in FIG. 6D. The first switching lever 18 is pivotedas the arm 18 b traces a cam 38, described later. Further, the arm 18 aabuts against the stopper portion 7 a or 7 b of the planetary lever 7 tohinder the revolution of the planetary lever 7.

[0078] Reference numeral 19 denotes a second switching lever rotatablysupported on the bottom board 17 and having a cam portion 19 a linkedwith the shaft 18 c of the first switching lever 18, and an arm 19 babutting against the stopper portion 9 a or 9 b of the planetary lever 9to hinder the revolution of the planetary lever 9, as shown in FIG. 6E.

[0079] Reference numeral 20 denotes a torsion spring that urges thefirst switching lever 18 to rotate counterclockwise as viewed from thebottom surface of the camera. The first and second switching levers 18and 19 are pivoted in opposite directions based on the relationshipbetween the shaft 18 c and the cam portion 19 a so that when one of theswitching levers rotates clockwise, the other rotates counterclockwise.

[0080] Reference numeral 21 denotes a cover that serves to prevent thegears 4 and 5, the planetary levers 7 and 9, the gears 10 and 12 to 15and the switching levers 18 and 19 from slipping off. The cover 21 isfixed to the bottom board 17 by screws.

[0081] Reference numeral 22 denotes the rewinding fork unit forrewinding the film into the film cartridge, which is rotatably supportedon the cover 21. The rewinding fork unit 22 is provided with a pulley ata lower end thereof, around which the timing belt 16 is wound.

[0082] Reference numeral 23 denotes a roller for applying apredetermined tension to the timing belt 16, which is rotatablysupported on the cover 21.

[0083] The components described above and including the first motor M1,the gear 2 to the roller 32 constitute one driving unit D, which isattached to the bottom surface of the camera main body 1 via threecylindrical damper rubbers 24 and staged screws 25 in a fashion floatingfrom the bottom surface.

[0084] Reference numeral 26, shown in FIG. 1, denotes a photo reflectorfor optically detecting movement of perforations formed in the film. Thephoto reflector 26 is fixed to a right side of the aperture surface ofthe camera main body 1 at a predetermined location thereof.

[0085] Next, in the mirror box unit MB shown in FIGS. 1 and 3, referencenumeral 30 denotes a mirror box. The mirror box 30 has a mirror unit MRmounted therein and which can advance into and recede from aphotographic optical path; it advances into the photographic opticalpath at a location (hereinafter referred to as “the finder observingposition”) where it is obliquely disposed, to reflect a photographiclight beam to a finder observing system, and recedes from thephotographic optical path into a position above the same (photographingposition) for film exposure. The mirror box 30 also has shafts and otherparts integrally formed on side and bottom surfaces thereof to supportgears, levers, and other parts constituting a mirror and shutter drivingsystem (first driving system) for driving the mirror unit MR so as toadvance or recede and for driving charging of the shutter unit S and anelectronic flash popup driving system (fifth driving system) for drivingpopping-up of an electronic flash, described later.

[0086] Reference numeral M2 denotes a second motor which is asmall-sized cored motor with a lower output than the first motor M1. Thesecond motor M2 is fixed to the mirror box 30 and has a gear 31 securedto an output shaft thereof. Driving force of the second motor M2 istransmitted to a gear 33 via the gear 31 and a gear 32.

[0087] Reference numeral 34 denotes a sun gear having a larger-sizedgear portion meshing with the gear 33 and a smaller-sized gear portionmeshing with a planetary gear 35 as shown in FIG. 6G that constitutes athird planetary clutch (third planetary mechanism). The planetary gear35 is supported by a planetary lever 36 so as to revolve around thesmaller-sized gear portion of the sun gear 34.

[0088] Reference numeral 37 denotes a switching gear which is disposedto mesh with the planetary gear 35 revolved by rotation of the secondmotor M2 in the first direction (for example, backward rotation). Theswitching gear 37 also meshes with a cam gear 38.

[0089] As shown in FIG. 6H, the cam gear 38 has a gear portion 38 ameshing with the switching gear 37, and a cam portion 38 b. The camportion 38 b is formed and disposed so as to be traced by the arm 18 bof the first switching lever 18 described previously. Thus, while thecam gear 38 makes one rotation, the first switching lever 18, urged bythe torsion spring 20, is pivoted due to the tracing of the cam portion38 b by the arm 18 b, and the second switching lever 19 follows thisoperation to be pivoted in a direction opposite to the one in which thefirst switching lever 18 is pivoted. In this connection, the first andsecond levers 18 and 19 and the cam gear 38 constitute a switchingmechanism set forth in relevant claims.

[0090] Further, reference numeral 40 denotes a phase substrate (see FIG.7A). A brush 39 attached to the cam gear 38 as shown in FIG. 6H slidesover a pattern formed on the phase substrate 40 so that the rotationalposition of the cam gear 38 can be detected.

[0091] Reference numeral 41 denotes an electronic flash transmittinggear which is disposed to mesh with the planetary gear 35 revolved byrotation of the second motor M2 in the second direction (for example,forward rotation). The electronic flash transmitting gear 41 transmitsthe rotation of the second motor M2 to the electronic flash transmittingsystem.

[0092] The above described gears 32, 33, 34, and 37 and cam gear 38 arerotatably supported by shafts formed on a bottom surface of mirror box30, and the gear 41 is fixed to a shaft 42 rotatably supported on a sidesurface of the mirror box 30.

[0093] Reference numeral 43 denotes a cover that prevents the gears 32,33, 34, 37, and 41 from slipping off. Reference numeral 44 denotes amirror and shutter transmitting gear which is disposed to mesh with theplanetary gear 6 revolved by rotation of the first motor M1 of thedriving unit D in the first direction (for example, backward rotation).The mirror and shutter transmitting gear 43 meshes with a gear 45 totransmit the rotation of the first motor M1 to the mirror and shutterdriving system.

[0094] The gears 44 and 45 are both rotatably supported on shafts formedon the cover 43. Reference numeral 46 also denotes a gear rotatablysupported on the cover 43 and on the mirror box 30 and fixed to a lowerend of the shaft 47 rotatably supported on the side surface of themirror box 30.

[0095] Reference numeral 48 denotes a cover that prevents the gears 44,45, and 46 and the cam gear 38 from slipping off and is fixed to thebottom surface of the mirror box 30 by screws together with the cover43.

[0096] Further, reference numeral 49 denotes a worm gear secured to anupper end of the shaft 42 above the side surface of the mirror box 30.Reference numeral 50 denotes a sun gear having a helical gear meshingwith the worm gear 49 so as to shift the rotating direction of thelatter through 90°. The sun gear 50 meshes with a planetary gear 51constituting a fourth clutch. The planetary gear 51 is supported by aplanetary lever 52 rotatably supported on a shaft located on an upperside of the side surface of the mirror box 52, so as to revolve aroundthe sun gear 50. When the second motor M2 rotates in the seconddirection, the planetary gear 51 revolves counterclockwise with respectto the side surface of the mirror box 30.

[0097] Further, reference numerals 53 and 53 denote worm gears locatedon the side surface of the mirror box 30 shown in FIG. 4 and fixed tothe shaft 47. Reference numeral 55 denotes a cam gear rotatablysupported on a shaft formed on the side surface of the mirror box 30. Asshown in FIG. 6I, the cam gear 55 has a cam portion 55 a for driving themirror unit MR between the finder observing position and thephotographing position, and a brush 56 secured to a side thereofopposite to the cam portion 55 a and disposed to slide over a pattern ofa phase substrate 61, described later. Moreover, the cam gear 55 has ahelical gear portion formed thereon and meshing with the worm gear 53 soas to shift the rotating direction of the latter through 90°. The camgear 55 is rotated counterclockwise as viewed from the side surface ofthe mirror box, by rotation of the first motor rotates M1 in the firstdirection.

[0098] Reference numeral 57 denotes a cam gear rotatably supported on ashaft formed on the side surface of the mirror box 30. As shown in FIG.6L, the cam gear 57 has a cam portion 57 a for charging the shutter unitS after photographing, and a helical gear portion meshing with the wormgear 54 so as to shift the rotating direction of the latter through 90°.The cam gear 57 is rotated counterclockwise as viewed from the sidesurface of the mirror box, by rotation of the first motor M1 in thefirst direction.

[0099] The worm gears 53 and 54 and the helical gear portions of the camgears 55 and 57 have the same gear configuration, that is, the samenumber of threads and the same number of teeth. Thus, the both pairs ofthe worm gears and the helical gear portions have the same gear ratiowith which the rotation of the first motor M1 is transmitted while themotor M1 is rotated in the first direction. Consequently, the cam gears55 and 57 are always kept in phase while they are rotating.

[0100] Reference numeral 58 denotes a mirror lever that is pivoted totransmit the phase of the cam portion 55 a of the cam gear 55 to themirror unit MR. As shown in FIG. 6J, the mirror lever 58 has an arm 58 afor tracing the cam portion 55 a, and an arm 58 b for driving the mirrorunit MR, and is rotatably supported on a shaft formed on the sidesurface of the mirror box 30.

[0101] Reference numeral 59 denotes a charge lever that is pivoted totransmit the phase of the cam portion 57 a of the cam gear 57 to theshutter unit S. As shown in FIG. 6K, the charge lever 59 has an arm 59 afor tracing the cam portion 57 a, and an arm 59 b for driving a chargedriving section of the shutter unit S, and is rotatably supported on ashaft formed on the side surface of the mirror box 30 (FIG. 4).

[0102] Reference numeral 60, shown in FIG. 3, denotes a cover thatserves to prevent the cam gears 55 and 57, the mirror lever 58, and thecharge lever 59 from slipping off. The cover 60 is fixed to the sidesurface of the mirror box 30 by screws.

[0103] Reference numeral 61 denotes the phase substrate, alreadyreferred to (see FIG. 6N), secured to the cover 60 and having a patternover which the brush 56 attached to the cam gear 55 slides when the camgear 55 is rotated. The phase substrate 61 indexes the movement of themirror and the phase of the shutter charging operation.

[0104] Reference numeral 62 denotes a torsion spring comprised of a coilportion held around a rotary shaft of the mirror lever 58, and two armsone of which rests against a portion of the mirror box 30, with theother resting against the shaft of the mirror unit MR. Thus, the mirrorunit MR is urged toward the mirror lever 58.

[0105] Reference numeral 63 denotes a torsion spring comprised of a coilportion held around a shaft 60 a formed on the cover 60, and two armsone of which rests against shafts 60 a and 60 b formed on the cover 60,with the other resting against the shaft of the mirror unit MR. Thetorsion spring 63 urges the mirror unit MR toward the finder observingposition (downward direction). Accordingly, when the mirror unit MRlowers, the lowering operation is switched such that the mirror unit MRis initially urged by the torsion spring 63 and subsequently by thetorsion spring 62.

[0106] Reference numeral 64 denotes a torsion spring for urging thecharge lever 59 against the cam gear 57, which is comprised of a coilportion held around a rotary shaft of the charge lever 59, and two armsone of which rests against a portion of the mirror box 30, with theother resting against the arm of the charge lever 59 (FIG. 4).

[0107] Referring next to FIG. 5, reference character C denotes an uppercover as an outer part of the camera which is fixed to an upper portionof the camera main body 1 so as to cover a penta prism, not shown,constituting a finder optical system.

[0108] Reference numeral 70 denotes a gear with which meshes theplanetary gear 51 which revolves counterclockwise via a gear trainconsisting of the gears 31 to 35 and 41, the shaft 42, the worm gear 49,and the gear 50 when the second motor M2 rotates in the seconddirection, so that the rotation of the second motor M2 is transmitted tothe gear 70 to rotate the same.

[0109] Reference numeral 71 denotes a cam gear which meshes with thegear 70 to rotate clockwise and has cam portions 71 a and 71 b arrangedon a front and a rear surfaces thereof, respectively.

[0110] Reference numeral 72 denotes a normally-open type leaf switchthat is turned on and off by the cam portion 71 b of the cam gear 71 tooutput a signal for causing rotation of the cam gear 71 to be detected.

[0111] Reference numeral 73 denotes a bottom board that rotatablysupports the gear 70 and the cam gear 71 and to which the leaf switch 72is secured. The bottom board 73 is secured to the inside of the uppercover C.

[0112] Reference numeral 74 denotes an electronic flash caseconstituting a base of an electronic flash unit ST that can be popped upand down between a light emission enabled position and a housedposition, wherein shafts formed on laterally (direction perpendicular tothe sheet of the drawing) opposite sides of the electronic flash caseare rotatably supported in an upper part of the upper cover C. One ofthe shafts is formed at a proximal end portion of a lever 75 attached tothe electronic flash case 74.

[0113] As shown in FIG. 60, the lever 75 has a shaft 75 a, and a pin 75b driven by the cam portion 71 a of the cam gear 71, the shaft 75 a andthe pin 75 b being arranged at opposite ends of the lever 75. The shaft75 a rotatably penetrates through the electronic flash case 74 from theinside of the upper cover C, and has a lever 76 secured thereto by ascrew 77.

[0114] Thus, the lever 75 located inside the upper cover C and the lever76 located inside the electronic flash unit ST are pivoted together.Further, the other shaft of the electronic flash case 74 is rotatablysupported on the upper cover C by staged screws, not shown.

[0115] Reference numeral 78 denotes a torsion spring having two arms oneof which rests against the lever 76, with the other resting against theshaft 74 a of the electronic flash case 74. The torsion spring 78rotatively urges the levers 75 and 76 clockwise with respect to theelectronic flash case 74.

[0116] Reference numeral 79 denotes a stopper pin secured to a sidesurface of the upper cover C. Reference numeral 74 b denotes a shaftformed on the electronic flash case 74. Reference numeral 74 c denotes afan-shaped slot formed in the electronic flash case 74 and through whichthe stopper pin 79 located on the side surface of the upper cover C isprojected into the electronic flash unit ST when the latter is popped upor down between the light emission enabled position and the housedposition. The light emission enabled position of the electronic flashunit ST is determined by the stopper pin 79 abutting against a trailingend of the fan-shaped slot 74 c.

[0117] Reference numeral 80 denotes a toggle spring having two arms oneof which rests against the stopper pin 79, with the other restingagainst the shaft 74 b. The toggle spring 80 urges the electronic flashunit ST in an upward direction when the latter is located between anintermediate position and the light emission enabled position within thepopping-up and -down range thereof, and urges it in a downward directionwhen it is located between the intermediate position and the housedposition.

[0118] Reference numeral 81 denotes a flash light emitting sectioncomposed of a xenon tube, a reflector, an optical panel, and others.Reference numeral 82 denotes a plastic cover, and reference numeral 83denotes an aluminum cover constituting an armor. The cover 82 is fittedinside the cover 83, which is in turn secured to the electronic flashcase 74.

[0119] Here, the urging force of the torsion spring 78 is set to bealways greater than that of the toggle spring 80. Thus, when therotation of the second motor M2 in the second direction is transmittedto the cam gear 71 to drive the lever 75, the torsion 78 overcomes thetoggle spring 80 to push up the electronic flash unit ST toward thelight emission enabled position. When an area where the urging directionof the toggle spring 80 is inverted is exceeded, due to the drag forceof the toggle spring 80, the electronic flash unit ST is further raisedcloser to the light emission enabled position.

[0120] If the popping-up operation is hindered by a photographer's handor the like while the electronic flash unit T is popping up toward thelight emission enabled position, the resulting force is absorbed by thetorsion spring 78 to prevent the rotation of the lever 75 from beingtransmitted to the electronic flash unit ST. Thus, only the levers 75and 76 are pivoted to protect the electronic flash unit ST.

[0121] Next, the operation of the internal mechanism of the cameraconstructed as described above will be described. FIGS. 7A to 9C are topplan views showing the relationship between the transmission of therotation of the first motor M1 and the phases of the switching levers 18and 19 indexed by the cam gear 38 driven by rotation of the second motorM2 in the first direction. FIGS. 7A, 8A, and 9A show positions in whichthe cam gear 38 (brush 39) is stopped on the phase circuit 40, and FIGS.7B, 7C; 8B, 8C; and 9B and 9C show how rotation of the first motor M1 istransmitted when the first motor M1 rotates in the first direction, withthe cam gear 38 still stopped in the positions shown in FIGS. 7A, 8A,and 9A. Further, FIGS. 7D, 7E; and 8D and 8E show how rotation of thefirst motor M1 is transmitted when the first motor M1 rotates in thesecond direction, with the cam gear 38 still stopped in the positionsshown in FIGS. 7A, 8A, and 9A.

[0122]FIGS. 21A to 23 are views corresponding, respectively, tooperations shown in FIGS. 7B to 7E, 8B to 8E, and 9B and 9C. Inparticular, FIGS. 21A to 23 show in perspective the positionalrelationship between the projection 7 c of the planetary lever 7 and theprojection 9 c of the planetary lever 9.

[0123] In FIG. 7A, when the second motor M2 is rotated in the firstdirection so that the brush 39 of the cam gear 38 is stopped at a shadedportion of the phase substrate 40, a signal indicative of POCH1: LowPOCH2: Low is output through the brush 39.

[0124] In this state, as shown in FIG. 7B, when the first motor rotatesin the first direction, rotation of the pulley 2 is transmitted via thetiming belt 3 to the sun gear 5, which thereby rotates clockwise. Thus,the planetary gear 6 and the planetary lever 7 also revolve clockwise.At this time, the arm 18 b of the first switching lever 18 has alreadyreceded to a location where it does not abut against the stopper portion7 a of the planetary lever 7 with the planetary gear 6, so that theplanetary gear 6 meshes with the gear 44. Thus, the rotation of thefirst motor M1 is transmitted via the gears 45 and 46, the shaft 47, andthe worm gears 53 and 54 to the cam gears 55 and 57, which therebyrotate counterclockwise as viewed from the side surface of the mirrorbox 30. The mirror unit MR is thereby driven so as to pop down from thephotographing position toward the finder observing position.

[0125] Subsequently, when the brush 56 attached to the cam gear 55reaches a mirror popup stopping phase (CMSP1: Low, CMSP2: High) on thephase substrate 61 shown in FIG. 6N and then the first motor M1 isbraked and stopped, the mirror unit MR is stopped at the photographingposition. Further, when the brush 56 attached to the cam gear 55 reachesa shutter charge completely stopping phase (CMSP1: High, CMSP: Low) onthe phase substrate 61 shown in FIG. 6N an then the first motor M1 isbraked and stopped, the mirror unit MR is stopped at the finderobserving position and the device is brought into a shutter chargecompleted state, as shown in FIG. 4.

[0126] At this time, as shown in FIG. 7C, the planetary gear 8 and theplanetary lever 9 also revolve clockwise like the planetary gear 6 andthe planetary lever 7, but the arm 19 b of the second switching lever 19abuts against the stopper portion 9 a of the planetary lever 9 with theplanetary gear 6, so that the planetary gear 8 runs idle instead ofrevolving to a position where it meshes with the gear 12. Accordingly,no rotation of the first motor M1 is transmitted to the component fromthe rewinding transmitting gear 12 to the rewinding fork unit 22. Atthis time, the planetary levers 7 and 9 first revolve in the samedirection and then transmit driving power, and therefore the projection7 c of the planetary lever 7 and the projection 9 c of the planetarylever 9 are positioned such that they do not interfere with each other,as shown in FIG. 21A.

[0127] On the other hand, as shown in FIG. 7D, when the first motor M1rotates in the second direction, the rotation of the pulley 2 istransmitted via the timing belt 3 to the sun gear 5, which therebyrotates counterclockwise. Thus, the planetary gear 6 and the planetarylever 7 also revolve counterclockwise. At this time, the arm 18 b of thefirst switching lever 18 has already reached a position where it doesnot abut against the stopper portion 7 b of the planetary lever 7 withthe planetary gear 6, which thereby meshes with the gear portion 10 a ofthe gear 10. Thus, the rotation of the first motor M1 is transmitted viathe gear 10 c to the spool 11, which thereby rotates at a high speed ina film winding direction.

[0128] At this time, as shown in FIG. 7E, the planetary gear 8 and theplanetary lever 9 also revolve counterclockwise like the planetary gear6 and the planetary lever 7, but the arm 19 b of the second switchinglever 19 abuts against the stopper portion 9 a of the planetary lever 9with the planetary gear 6, so that the planetary gear 8 runs idleinstead of revolving to a position where it meshes with the gear 12. Thefilm is thus wound at a high speed, and when perforations correspondingin number (for example, eight) to one frame are detected by the photoreflector 26, the first motor M1 is braked to complete the operation ofwinding the film for one frame. At this time, the planetary levers 7 and9 first revolve in the same direction and then transmit driving power,and therefore the projection 7 c of the planetary lever 7 and theprojection 9 c of the planetary lever 9 are positioned such that they donot interfere with each other, as shown in FIG. 21B.

[0129] Next, in FIG. 8A, when the second motor M2 is rotated in thefirst direction so that the brush 39 of the cam gear 38 is stopped atthe shaded portion of the phase substrate 40, a signal indicative ofPOCH1: High POCH2: Low is output through the brush 39.

[0130] In this state, as shown in FIG. 8B, when the first motor rotatesin the first direction, the rotation of the pulley 2 is transmitted viathe timing belt 3 to the sun gear 5, which thereby rotates clockwise.Thus, the planetary gear 6 and the planetary lever 7 also revolveclockwise. At this time, the arm 18 b of the first switching lever 18has already receded to a location where it does not abut against thestopper portion 7 a of the planetary lever 7 with the planetary gear 6,so that the planetary gear 6 meshes with the gear 44. Thus, the rotationof the first motor M1 is transmitted via the gears 45 and 46, the shaft47, and the worm gears 53 and 54 to the cam gears 55 and 57, whichthereby rotate counterclockwise as viewed from the side surface of themirror box 30. The mirror unit MR is thereby driven so as to pop downfrom the photographing position to the finder observing position.

[0131] Then, when the brush 56 attached to the cam gear 55 reaches themirror popup stopping phase (CMSP1: Low, CMSP2: High) on the phasesubstrate 61 shown in FIG. 6N and the first motor M1 is then braked andstopped, the mirror unit MR is stopped at the photographing position.Further, when the brush 56 attached to the cam gear 55 reaches theshutter charge completely stopping phase (CMSP1: High, CMSP: Low) on thephase substrate 61 and the first motor M1 is then braked and stopped,the mirror unit MR is stopped at the finder observing position and thedevice is brought into the shutter charge completed state, as shown inFIG. 4.

[0132] At this time, as shown in FIG. 8C, the planetary gear 8 and theplanetary lever 9 also revolve clockwise like the planetary gear 6 andthe planetary lever 7, but the arm 19 b of the second switching lever 19abuts against the stopper portion 9 a of the planetary lever 9 with theplanetary gear 6, so that the planetary gear 8 runs idle instead ofrevolving to a position where it meshes with the gear 12. Accordingly,no rotation of the first motor M1 is transmitted to the components fromthe rewinding transmitting gear 12 to the rewinding fork unit 22. Atthis time, the planetary levers 7 and 9 first revolve in the samedirection and then transmit driving power, and therefore the projection7 c of the planetary lever 7 and the projection 9 c of the planetarylever 9 are positioned such that they do not interfere with each other,as shown in FIG. 22A.

[0133] On the other hand, as shown in FIG. 8D, when the first motor M1rotates in the second direction, the rotation of the pulley 2 istransmitted via the timing belt 3 to the sun gear 5, which therebyrotates counterclockwise. Thus, the planetary gear 6 and the planetarylever 7 also revolve counterclockwise. At this time, the arm 18 b of thefirst switching lever 18 has already advanced into a location where itabuts against the stopper portion 7 b of the planetary lever 7 with theplanetary gear 6, so that the planetary gear 6 runs idle instead ofrevolving to a position where it meshes with the gear portion 10 a ofthe gear 10.

[0134] In contrast, as shown in FIG. 8E, the planetary gear 8 and theplanetary lever 9 also revolve counterclockwise like the planetary gear6 and the planetary lever 7, and at this time, the arm 19 b of thesecond switching lever 19 has already receded to a location where itdoes not abut against the stopper portion 9 a of the planetary lever 9with the planetary gear 6, so that the planetary gear 8 meshes with thegear portion 10 b of the gear 10. Thus, the rotation of the first motorM1 is transmitted via the gear 10 c to the spool 11, which therebyrotates at a low speed in the film winding direction.

[0135] Subsequently, when perforations corresponding in number (forexample, eight) to one frame are detected by the photo reflector 26, thefirst motor M1 is braked to complete the operation of winding the filmfor one frame. At this time, the planetary levers 7 and 9 first revolvein the same direction and then transmit driving power, and therefore theprojection 7 c of the planetary lever 7 and the projection 9 c of theplanetary lever 9 are positioned such that they do not interfere witheach other, as shown in FIG. 22B.

[0136] Next, in FIG. 9A, when the second motor M2 is rotated in thefirst direction so that the brush 39 of the cam gear 38 is stopped atthe shaded portion of the phase substrate 40 (when a third state setforth in relevant claims is entered), a signal indicative of POCH1: HighPOCH2: High is output through the brush 39.

[0137] In this state, as shown in FIG. 9B, when the first motor rotatesin the first direction, the rotation of the pulley 2 is transmitted viathe timing belt 3 to the sun gear 5, which thereby rotates clockwise.Thus, the planetary gear 6 and the planetary lever 7 also revolveclockwise. At this time, the arm 18 b of the first switching lever 18has already advanced into a location where it abuts against the stopperportion 7 a of the planetary lever 7 with the planetary gear 6, so thatthe planetary gear 6 runs idle instead of revolving to a position whereit meshes with the gear 44. Thus, no rotation of the first motor M1 istransmitted to the components from the gear 44 to the cam gears 55 and57, whereby the mirror driving or shutter charge driving operation isnot performed.

[0138] Further, at this time, as shown in FIG. 9C, the planetary gear 8and the planetary lever 9 also revolve clockwise. The arm 19 b of thesecond switching lever 19 has already receded to a location where itdoes not abut against the stopper portion 9 a of the planetary lever 9with the planetary gear 8, so that the planetary gear 8 meshes with thegear 12. Thus, the rotation of the first motor M1 is transmitted via thegears 13 to 15 and the timing belt 16 to the rewinding fork unit 22,which thereby rotates in a film rewinding direction for a film rewindingoperation. At this time, the planetary levers 7 and 9 first revolve inthe same direction and then transmit driving power, and therefore theprojection 7 c of the planetary lever 7 and the projection 9 c of theplanetary lever 9 are positioned such that they do not interfere witheach other, as shown in FIG. 23.

[0139] In the phase state shown in FIG. 9A, the first motor M1 does notrotate in the second direction.

[0140] By rotation of the second motor M2 in the first direction, thepositions of the switching levers 18 and 19 are cyclically switched inthe order of the one shown in FIGS. 8B, 8C or 8D, 8E, the one shown inFIGS. 7B, 7C or 7D, 7E, the one shown in FIGS. 9B, 9C, and the one shownin FIGS. 8B, 8C or 8D, 8E.

[0141] Thus, if, for example, in the state shown in FIG. 9C, the userrewinds and takes out the film from the camera and then rotates the camgear 38 through a minimum angle (that is, in a minimum period of time)in order to wind a newly loaded film, the switching mechanism can be setin the state shown in FIG. 8D or 8E. Further, if the power supplybattery with lowered voltage is replaced with a new one in the stateshown in FIG. 8E where the film winding speed is low, the switchingmechanism can be set into the state shown in FIG. 7D or 7E by rotatingthe cam gear 38 through the minimum angle (that is, in the minimumperiod of time). Specifically, in the present embodiment, the period oftime required for the second motor M2 to rotate the cam gear 38 from onephase to its adjacent phase is about 60 ms, and the period of timerequired to rotate the cam gear 38 from one phase to a phase adjacent tothe adjacent one is about 120 ms.

[0142] Accordingly, if the film or the battery is replaced with a newone(s) during photographing, the effects of the replacement can beminimized.

[0143] In the above description of FIGS. 7A to 9C and FIGS. 21A to 23,the first and second switching levers 18 and 19 are driven (phaseindexing) by rotation of the second motor M2 of a lower output in thefirst direction, to thereby select whether the rotation of therelatively large-sized first motor M1 of a higher output is to betransmitted via the first planetary clutch or via the second planetaryclutch. In the phase indexing state shown in FIGS. 7A to 7E and 8A to8E, the first motor M1 is rotated in the first direction to mesh theplanetary gear 6 with the gear 44 in order to carry out mirror pop-downdriving and shutter charge driving (FIGS. 7B, 7C and 21A; 8B, 8C and22A), whereas the first motor M1 is rotated in the second direction tocause the planetary gear 6 to wind the film at a high speed or cause theplanetary gear 8 to wind the film at a low speed (FIGS. 7D, 7E and 21B;8D, 8E and 22B).

[0144] Thus, a normal series of photographing (release) operations, thatis, the mirror popping-up operation, mirror popping-down and shuttercharging operation, and film winding operation are completed by a seriesof rotations of the first motor M1, i.e. the rotation in the firstdirection, the rotation in the second direction, and the rotation in thefirst direction in the mentioned order. Furthermore, as described below,by setting the stopping phase (phase indexing for the switching levers18 and 19) for the rotation of the second motor M2 in the firstdirection based on the power supply voltage level, whether the film isto be wound at a high speed or at a low speed can be selected.

[0145] Further, for the film rewinding operation, if the second motor M2is rotated in the first direction to switch the device to the stateshown in FIG. 9A and the first motor ml is then rotated in the firstdirection, then the film can be rewound by rotation of the first motorM1 in the first direction as shown in FIGS. 9B and 23.

[0146] In any of the states shown in FIGS. 7A to 9C and FIGS. 21A to 23,a rotative driving force generated by the rotation of the first motor M1in the first direction or the second direction causes the planetarylever 7 and the planetary lever 9 to revolve in the same direction thatcorresponds to the direction of the rotation of the first motor M1. Itis so set that at this time the projection 7 c of the planetary lever 7and the projection 9 c of the planetary lever 9 do not interfere witheach other.

[0147] Now, a description will be given of such an abnormal operationthat the planetary lever 7 and the planetary lever 9 revolve in oppositedirections to each other.

[0148] As stated before, in the case where when in the phase state shownin FIG. 9A the first motor M1 is rotated in the first direction toperform the film rewinding operation as shown in FIGS. 9B, 9C and 23A,an abnormality occurs in the film being rewound to suddenly stop thefilm, this stoppage of the film is transmitted from the rewinding forkunit 22 to the pulley 2 through the timing belt 16, gears 15 to 12,planetary gear 8, sun gear 5, gear 4 and timing belt 3 in the mentionedorder, to lock the first motor M1. At this time, the stopper portion 7 aof the planetary lever 7 then revolving in the clockwise direction isbrought into urging contact with the arm 18 b of the first switchinglever 18, which hinders the planetary gear 6 from meshing with the gear44. Consequently, the planetary gear 6 thus running idle in thecounterclockwise direction causes, due to its own rotation inertia, theplanetary lever 7 to revolve in the counterclockwise direction even witha sudden stoppage of the sun gear 5. However, as shown in FIG. 24, theprojection 7 c of the planetary lever 7 interferes with the projection 9c of the planetary lever 9 so that the planetary gear 6 with theplanetary lever 7 is hindered from revolving and held in a position inwhich it does not mesh with the gear portion 10 a of the gear 10. Thus,it is so designed that the meshing between the planetary gear 8 and thegear 12 and the meshing between the planetary gear 6 and the gear 10 donot occur at the same time.

[0149] On the other hand, in the conventional planetary mechanism inwhich the planetary lever 7 and the planetary lever 9 do not have theprojections 7 c, 9 c formed thereon, as shown in FIG. 25, the meshingbetween the planetary gear 8 with the planetary lever 9 and the gear 12and the meshing between the planetary gear 6 with the planetary lever 7and the gear 10 occur at the same time. Then, a closed-loop drivingpower transmission system is formed, in which driving power istransmitted from the sun gear 5 through the planetary gear 8, gears 12to 15, timing belt 16, rewinding fork unit 22, and the film, and thenreturned through the spool 11, gear 10, planetary gear 6 to the sun gear5. Consequently, even if the motor M1 is continuously energized forrotation in either direction, the elements on the both sides of the filmpull the film in the opposite directions, thus causing malfunctioning ofthe internal mechanism.

[0150] Next, the electronic flash popping-up operation and manualpopping-down operation will be described with reference to FIG. 10.

[0151] When the second motor rotates in the second direction with theelectronic flash unit ST located in the housed position as shown in FIG.10A, the cam gear 71 is rotated clockwise, and then the cam 71 a of thecam gear 71 pushes the pin 75 a of the lever 75 to push up theelectronic flash unit ST toward the light emission enabled positionagainst the force of the toggle spring 80, as shown in FIG. 10B.

[0152] At this time, since the urging force of the torsion spring 78 isset to be always greater than that of the toggle spring 80 as describedpreviously, the pushup of the pin 75 a is not absorbed, so that theelectronic flash unit ST is displaced by an amount corresponding to thedisplacement angle of the lever 75.

[0153] The area where the urging direction of the toggle spring 80 isinverted is set to an intermediate point in an area where the cam 71 aof the cam gear 71 a pushes the pin 75 a of the lever 75, so that beyondthe inversion area, the drag force of the toggle spring 80 causes theelectronic flash unit ST to be pushed up toward the light emissionenabled position. Thus, midway during this operation, the cam gear 71becomes stopped from undergoing a load required to push up theelectronic flash unit ST, and is further rotated clockwise to cause thecam 71 b to turn the leaf switch 72 on as shown in FIG. 10C, thusswitching an output signal from the leaf switch 72 from High to Low.

[0154] Subsequently, the cam gear 71 further rotates clockwise to causethe cam 71 b of the cam gear 71 to turn the leaf switch 72 off as shownin FIG. 10D, thus switching the output signal from the leaf switch 72from Low to High.

[0155] Thus, when the popped-up state of the electronic flash unit ST isdetected by an electronic flash popup detecting switch SWSTUP (see FIG.12), the second motor M2 is stopped to complete the operation of poppingup the electronic flash unit ST to the light emission enabled position.

[0156] Then, when the photographer manually pushes down the electronicflash unit ST located in the light emission enabled position as shown inFIG. 10D, after the inversion area of the toggle spring 80 is exceeded,the drag force of the toggle spring 80 causes the electronic flash unitST to be popped down to the housed position, whereby the camera returnsinto the state shown in FIG. 10A. At this time, the cam 71 a of the camgear 71 has already receded from the pivoting range of the pin 75 a ofthe lever 75, so that no drag force, as otherwise absorbed by thetorsion spring 78, is exerted.

[0157] Further, in the state shown in FIG. 10A, when the photographermanually pulls up the electronic flash unit ST, after the inversion areaof the toggle spring 80 is exceeded, the drag force of the toggle spring80 causes the electronic flash unit ST to popped up to the lightemission enabled position as shown in FIG. 10D, whereby the electronicflash popped-up state is detected by the electronic flash popupdetecting switch SWSTUP, similarly to the above described case.

[0158] In this manner, the electronic flash popup driving mechanismaccording to the present embodiment is constructed to deal not only withthe automatic popping-up operation based on the driving by the secondmotor M2 but also with the photographer's manual popping-up operation.

[0159] In the present embodiment, the driving load exerted on theelectronic flash popup driving system is lighter than that exerted onthe mirror and shutter driving system, the film winding driving system,or the film rewinding driving system.

[0160] Now, a description will be given of a case where the electronicflash unit ST is driven to pop up by rotation of the second motor M2 inthe second direction with the electronic flash unit ST still held in thehoused position by the photographer's fingers or the like.

[0161] First, in a state shown in FIG. 11A, when the second motor M2 isrotated in the second direction, the cam gear 71 rotates clockwise, andthe cam 71 a of the cam gear 71 thus attempts to push up the pin 75 a.Since, however, the electronic flash unit ST is held in the housedposition, the torsion bar 78 absorbs the possible displacement angle ofthe lever 75 as shown in FIG. 11B.

[0162] Subsequently, the cam gear 71 continues to rotate clockwise tocause the cam 71 b of the cam gear 71 to turn the leaf switch 72 on asshown in FIG. 11C, thus switching the output signal therefrom from Highto Low.

[0163] As the cam gear 71 further continues to rotate clockwise, thedevice returns into the state shown in FIG. 11A, and the cam 71 b of thecam gear 71 turns the leaf switch 72 off to switch the output signaltherefrom from Low to High. The popping-up operation of the electronicflash unit electronic flash ST, however, cannot be ascertained by thepopup detecting switch SWSTUP, so that the same operation is repeatedfurther twice, the second motor M2 is subsequently stopped, and an errorin the operation of popping up the electronic flash unit ST to the lightemission enabled position is then indicated on an external display panelor the like of the camera.

[0164] Next, a control circuit of the camera will be described withreference to FIG. 12. In the figure, reference character CPU denotes amicrocomputer, and BAT denotes a battery. Reference character SW1denotes a photographing preparation switch which is turned on to turnthe power supply on in response to a first stroke operation of a releasebutton, not shown, and which also serves to start a light measuringoperation or a focus detecting operation for a photographing lens. Whenthe photographing preparation switch SW1 is turned on, this causes atransistor TRBAT to be turned on via a diode DSW1 and a resistor R2,thereby starting power supply from the battery BAT to various circuits.Further, an output from the photographing preparation switch SW1 issupplied to an input port SW1 of the microcomputer CPU.

[0165] The transistor TRABAT is also turned on via a diode DOS and theresistor R2 by an operation of a one-shot circuit OS for a certainperiod of time responsive to turning-on of a rear-cover switch SWBP(closure of a rear cover), hereinafter referred to. The purpose of theturning-on of the transistor TRBAT associated with the closure of therear cover is to supply power to the microcomputer CPU for film loadingwhen a film is loaded in the camera, followed by closing the rear cover,not shown.

[0166] In this connection, the transistor TRBAT is kept on via aninverter I1 and the resistor R2 as long as the microcomputer CPU isoperative with an output port Von thereof set to High.

[0167] Further, reference character REG denotes a regulator connected toa collector output of the transistor TRBAT to supply a stable fixedvoltage Vcc to various circuits (in the figure, the fixed voltage Vcc issupplied to an input port Vcc of the microcomputer CPU and to an analogcircuit MET for performing light measuring operations.

[0168] The light measuring analog circuit MET is constructed to performa BV-AV operation using subject brightness information (BV) determinedbased on an output from a light measuring sensor SPC and RAVcorresponding to preset aperture value information (AV) and inputresults of the BV-AV operation to an AD conversion input port ADIN1 ofthe microcomputer CPU as an output BV1OUT.

[0169] Reference character RISO denotes a variable resistorcorresponding to film sensitivity information SV, which inputs theinformation to an input port ADIN2 of the microcomputer CPU. Referencecharacter VBAT denotes the battery voltage of the battery BAT, which issupplied to an input port ADIN3 of the microcomputer CPU and to atransistor bridge circuit MD, described later.

[0170] Reference character SWPTin denotes a film loading detectingswitch composed, for example, of a leaf spring arranged in a cartridgechamber of the camera. The film loading detecting switch SWPTin isturned on when a film cartridge is loaded into the cartridge chamber topush the leaf spring, and supplies an output to an input port PTIN ofthe microcomputer CPU.

[0171] Reference character SWBP denotes a rear-cover switch that isturned on when the rear cover is closed and turned off when the latteris opened. An output from the rear-cover switch SWBP is supplied to aninput port BP of the microcomputer CPU and the one-shot circuit OS.

[0172] Reference numerals SWCMSP1 and SWCMSP2 denote switchescorresponding to phase patterns CMSP1 and CMSP2, respectively, on thephase substrate 61 and which are turned on and off in accordance withthe sliding of the brush 56 over these phase patterns. Outputs from theswitches SWCMSP1 and SWCMSP2 are supplied to input ports CMSP1 andCMSP2, respectively, of the microcomputer CPU. The relationship betweenthe state of the mechanism and the output signals (CMSP1, CMSP2) fromthe switches SWCMSP1 and SWCMSP2 is as described previously.

[0173] Reference characters SWPOCH1 and SWPOCH2 denote switchescorresponding to phase patterns POCH1 and POCH2, respectively, on thephase substrate 40 and which are turned on and off in accordance withthe sliding of the brush 39 over these phase patterns. Outputs from theswitches SWPOCH1 and SWPOCH2 are supplied to input ports POCH1 andPOCH2, respectively, of the microcomputer CPU. The relationship betweenthe state of the mechanism and the output signals (POCH1, POCH2) fromthe switches SWPOCH1 and SWPOCH2 is as described previously.

[0174] Reference character SWSTUP denotes an electronic flash popupdetecting switch for detecting whether the electronic flash unit ST hasbeen popped up to the light emission enabled position; the electronicflash popup detecting switch SWSTUP is composed of a leaf switch. Whenthe electronic flash unit ST is in the light emission enabled position,the electronic flash popup detecting switch supplies an output to aninput port STUP of the microcomputer CPU.

[0175] Reference character SWSTCTL denotes the leaf switch 72 fordetecting the phase of the cam 71 b of the cam gear 71 that drives theelectronic flash unit ST to the light emission enabled position, and forsupplying an output to an input port STCTL of the microcomputer.

[0176] Reference character FLM denotes the photo reflector 26. When thephoto reflector 26 is supplied with a signal from an output port PROM ofthe microcomputer CPU, a floodlight section thereof emits infrared lightand a light receiving section thereof detects light reflected from thefilm surface and supplies a detection signal (High) to an input portPRAD of the microcomputer CPU. The photo reflector 26 is arrangedopposite the perforations in the film, and when the infrared light istransmitted through the perforations and does not return to the lightreceiving section, detection signals Low are output, so that the photoreflector 26 counts these detection signals to detect the number ofpassed perforations, thus determining the amount of movement of thefilm.

[0177] Reference character DSP denotes a display driving circuit fordisplaying various information such as photographing information orwarnings, in accordance with signals supplied from an output port CSDSPof the microcomputer CPU.

[0178] Reference numeral SW2 denotes a release switch that is turned onupon a second stroke operation of the release button to permit aphotographing operation to be performed. An output from the releasebutton SW2 is supplied to an input port SW2 of the microcomputer CPU.

[0179] Reference numerals MD1 and MD2 denote transistor bridge circuitsthat control the first and second motors M1 and M2, respectively, asinstructed by the microcomputer, so as to rotate them in the first orsecond direction. The transistor bridge circuit MD1 is connected tooutput ports M1F and M1R, and the transistor bridge circuit MD2 isconnected to output ports M2F and M2R.

[0180] Reference numeral MG1 denotes a front-curtain magnet for keepinga front curtain of the shutter unit S in a charged state. Thefront-curtain magnet MG1 keeps the front curtain in the charged statewhile it is supplied with power and causes the front curtain to starttraveling when the power supply thereto is cut off. Specifically, whenan output port PS0 of the microcomputer CPU is set to Low, a transistorTRMG1 is turned off via a resistor RMG1 to cut off power supply to themagnet MG1.

[0181] Reference numeral MG2 denotes a rear-curtain magnet for keeping arear-curtain of the shutter unit S in a charged state. The rear-curtainmagnet MG2 keeps the rear curtain in the charged state while it issupplied with power and causes the rear curtain to start traveling whenthe power supply thereto is cut off. Specifically, when an output portPS1 of the microcomputer CPU is set to Low, a transistor TRMG2 is turnedoff via a resistor RMG2 to cut off power supply to the magnet MG2.

[0182] Reference character FLSH denotes an electronic flash circuitincluding a main capacitor, a xenon tube, and others and to which alight emitting signal FS, a light emission stopping signal FO, and acharge starting signal SC are supplied from the output ports of themicrocomputer CPU. Further, the electronic flash circuit FLSH supplies acharge completing signal CF to an input port of the microcomputer CPU.

[0183] Reference character X denotes a switch that is turned on when thefront curtain of the shutter unit S completes traveling, to supply asignal to an input port X of the microcomputer CPU. Reference numeralCN2 denotes a switch that is turned on when the rear curtain of theshutter unit S completes traveling, to supply a signal to an input portCN2 of the microcomputer CPU.

[0184] Now, the operation of the above described control circuit will bedescribed with reference to flow charts of FIGS. 13A to 20. Pairs ofsteps shown by numbers in circles between FIGS. 13A and 13B, betweenFIGS. 13B and 14, between FIGS. 15 and 16, between FIGS. 17A and 17B,and between FIGS. 19 and 20 each indicate that are linked together.

[0185] Upon receiving power supply, the microcomputer CPU executes aprogram to execute power supply retaining control by setting the outputport Von to High, while keeping the transistor TRBAT on.

[0186] In FIGS. 13A and 13B, the process starts with an automatic filmloading (hereinafter referred to as “AL”) routine [AL].

[0187] At a step S101, when the rear cover is closed so that the rearcover switch SWBP is turned on, the microcomputer CPU detects this, andthe process proceeds to a step S102.

[0188] At the step S102, the microcomputer CPU checks the voltage VBATof the battery BAT based on an analog input to the input port ADIN3 (ADconversion input port). An AD converter in the microcomputer CPUsubjects the voltage VBAT to AD conversion. When the voltage is equal toor lower than a predetermined level LELVELl corresponding to a voltageat or below which the operation of the camera is inhibited, the processproceeds to a step S103 because the camera may malfunction at such low avoltage. When the voltage exceeds the predetermined level LEVEL1, theprocess proceeds to a step S104.

[0189] At the step S103, the microcomputer CPU outputs a serial signalthrough the output port CSDSP to the display driving circuit DSP tothereby display a warning indicative of a battery voltage drop. Then,the process proceeds to a step S999.

[0190] At the step S999, a [STOP] routine is executed such that theoutput port Von is set to Low to turn off the transistor TRBAT andfurther the regulator REG is inactivated to turn off the circuit systempower supply. Further, the CPU is set to a standby mode for apredetermined time period. Typically, the power supply Vcc is kept offwhile the microcomputer CPU is in the standby mode.

[0191] The power supply Vcc, however, may remain on even after thestandby mode has been terminated. This occurs when the transistor TRBATis on due to a factor different from the output from the output portVon, specifically, when the one-shot circuit OS is operating due to theturning-on of the photographing preparation (power supply) switch SW1 orthe rear cover switch SWBP.

[0192] At a step S104, the microcomputer CPU determines whether theswitching mechanism is in the low-speed winding state shown in FIG. 8E,based on the phase of the cam gear 38. With the signal indicative ofPOCH1: High, POCH2: Low, the process proceeds to a step S108, andotherwise the process proceeds to a step S105.

[0193] At the step S105, the microcomputer CPU rotates the second motorM2 in the first direction so as to set the switching mechanism into thelow-speed winding state shown in FIG. 8E while the first motor M1 isrotating in the second direction.

[0194] Here, the microcomputer CPU controls the rotation of the secondmotor M2 by setting the output ports M2F and M2R to “H” and “L”,respectively, if the motor is to rotate in the first direction, and bysetting the output ports M2F and M2R to “L” and “H”, respectively, ifthe motor is to rotate in the second direction. Further, themicrocomputer CPU brakes the second motor M2 by setting both the outputports M2F and M2R to “H”.

[0195] At a step S106, if the microcomputer CPU determines that rotationof the cam gear 38 has set the phase of the phase substrate 40 toprovide the signal indicative of POCH1: High, POCH2: Low to thereby setthe switching mechanism into the low-speed winding state shown in FIG.8, the process proceeds to a step S107. If the signal indicative ofPOCH1: High, POCH2: Low is not established even after the lapse of apredetermined period of time (for example, 1 sec.), the process proceedsto the step S999 to execute the STOP routine.

[0196] At the step S107, when the signal is established at the stepS106, the microcomputer CPU brakes the second motor M2, and the processproceeds to a step S108.

[0197] At the step S108, the microcomputer CPU determines whether thefilm cartridge has been loaded in the camera, based on the output fromthe film loading detection switch SWPTIN. If the film cartridge has beenloaded, the process proceeds to the step S103, and otherwise the processproceeds to a [RELEASE] routine. The [RELEASE] routine will be describedlater.

[0198] At a step S109, the microcomputer CPU reads the ISO sensitivityof a DX code on the film cartridge through an output from the variableresistor RISO input to the input port ADIN2 (AD conversion input), andstores this sensitivity.

[0199] At a step S110, the microcomputer CPU rotates the first motor M1in the second direction to wind the film at a low speed, and the processproceeds to a step S111.

[0200] Here, the microcomputer CPU controls the first motor M1 bysetting the output ports M1F and M1R to “H” and “L”, respectively, ifthe motor is to rotate in the first direction, and by setting the outputports M1F and M1R to “L” and “H”, respectively, if the motor is torotate in the second direction. Further, the microcomputer CPU brakesthe second motor M1 by setting both the output ports M1F and M1R to “H”.

[0201] At a step S111, the microcomputer CPU counts the perforations inthe film through the photo reflector 26 (FLM), and resets a pulsecounter for storing the count in an EEPROM in the microcomputer CPU anda film counter for showing the number of photographing frames in thefilm.

[0202] At a step S112, the microcomputer CPU sets an internal timer to1.5 sec. for use as an AL timer.

[0203] At a step S113, the microcomputer CPU causes the photo reflector26 (FLM) to emit light through the output port PRON, and continues torotate the first motor M1 in the second direction until the firstperforation of the film through the input port PRAD is detected. In thiscase, if the detection of the first perforation, that is, a change in afilm signal from the photo reflector 26 fails to occur within 1.5 sec.as clocked by the AL timer, the process proceeds to a step S114. If itoccurs within 1.5 sec. as clocked by the AL timer, the process proceedsto a step S116.

[0204] At the step S114, the microcomputer CPU brakes the first motorM1.

[0205] At a step S115, the microcomputer outputs a serial signal to thedisplay driving circuit DSP through the output port CSDSP to therebydisplay a warning indicating that the AL is disabled. Then, the processproceeds to the step S999 to execute the [STOP] routine.

[0206] At the step S116, the microcomputer CPU counts up the pulsecounter of the internal EEPROM.

[0207] At a step S117, the microcomputer CPU resets the internal timerto 1.5 sec.

[0208] At a step S118, the microcomputer CPU newly sets the internaltimer to 300 msec.

[0209] At a step S119, as in the step S113, if the next perforation isnot detected within 300 msec. clocked by the internal timer, that is,the film signal from the photo reflector 26 fails to change within 300msec. as clocked by the internal timer, the process proceeds to a stepS120. If the signal changes within 300 msec. as clocked by the timer,the process proceeds to a step S121.

[0210] At the step S120, the microcomputer CPU brakes the first motorM1. The process then proceeds to the step S115 to cause the display toshow that the AL is disabled.

[0211] At the step S121, the microcomputer CPU counts up the pulsecounter of the internal EEPROM.

[0212] At a step S122, the microcomputer CPU determines whether or notthe pulse counter of the internal EEPROM has reached 20. If the counterhas reached 20, the process returns to the step S119. If the counter hasreached 20, the process proceeds to a step S123.

[0213] At the step S123, the microcomputer CPU brakes the first motorM1.

[0214] At a step S124, the microcomputer CPU resets the internal timerto 300 msec.

[0215] At a step S125, the microcomputer CPU rotates the second motor M2in the first direction so as to set the switching mechanism into thehigh-speed winding state shown in FIG. 7 while the first motor M1 isrotating in the second direction.

[0216] At a step S126, if the microcomputer CPU determines that rotationof the cam gear 38 has set the phase of the phase substrate 40 toprovide the signal indicative of POCH1: Low, POCH2: Low to thereby setthe switching mechanism in the high-speed winding state shown in FIG. 7,the process proceeds to a step S127. If the signal indicative of POCH1:Low, POCH2: Low is not established even after the lapse of apredetermined period of time (for example, 1 sec.), the process proceedsto the step S999 to execute the STOP routine.

[0217] At the step S127, when the signal is established at the stepS126, the microcomputer CPU brakes the second motor M2, and the processproceeds to a step S128.

[0218] At the step S128, the microcomputer CPU rotates the first motorM1 in the second direction to wind the film at a high speed, and theprocess proceeds to a step S129.

[0219] At the step S129, the microcomputer CPU newly sets the internaltimer to 150 msec.

[0220] At a step S130, as in the steps S113 and S119, if themicrocomputer CPU fails to detect the next perforation within 150 msec.clocked by the internal timer, that is, the film signal from the photoreflector 26 fails to change within 150 msec. as clocked by the internaltimer, the process proceeds to a step S131. If the signal changes within150 msec. as clocked by the timer, the process proceeds to a step S132.

[0221] At the step S131, the microcomputer CPU brakes the first motorM1. The process then proceeds to the step S115 to cause the display toshow that the AL is disabled.

[0222] At the step S132, the microcomputer CPU counts up the pulsecounter of the internal EEPROM.

[0223] At a step S133, the microcomputer CPU determines whether or notthe pulse counter of the EEPROM in the microcomputer CPU has reached 28.If the counter has not reached 28, the process returns to the step S126.If the counter has reached 28, the process proceeds to a step S134.

[0224] At the step S134, the microcomputer CPU brakes the first motorM1.

[0225] At a step S135, the microcomputer CPU resets the internal timerto 150 msec.

[0226] At a step S136, the microcomputer CPU counts up the film counterof the internal EEPROM to write 1 thereto, thus completing the AL.

[0227] Next, the [RELEASE] routine for photographing will be describedwith reference to FIGS. 15 and 16.

[0228] At a step S201, when the microcomputer CPU determines that theswitch SW1 has been turned on by subjecting the release button, notshown, to the first stroke operation, the process proceeds to a stepS202.

[0229] At the step S202, as in the step S102, the microcomputer CPUchecks the power supply voltage. If the voltage is equal to or lowerthan the predetermined level LEVEL1 (operation inhibiting voltage), theprocess proceeds to the step S103. If the voltage exceeds thepredetermined level LEVEL1, the process proceeds to a step S203.

[0230] At the step S203, the microcomputer CPU performs a lightmeasuring operation based on an output from the light measuring sensorSPC. Specifically, the microcomputer subjects an analog signal from theoutput port BV1OUT of the light measuring operation circuit MET, to ADconversion to obtain a digital value ADIN1, which is then stored in aregister BV1 (BV1=ADIN1). A value BV-AV as an apex value is stored inthe register BV1.

[0231] Further, the ISO sensitivity of the film is stored in theregister SV (SV=ADIN2) at the step S109.

[0232] Moreover, a shutter time is obtained based on the informationstored in the registers BV1 and SV (TV=BV1+SV). The contents of theregister TV are the TV of the apex value.

[0233] At a step S204, if the microcomputer CPU determines that thevalue BV1 obtained at the step S203 is smaller than a predeterminedvalue, that is, the brightness is insufficient, then the processproceeds to a [ELECTRONIC FLASH POPUP] routine in order to executeelectronic flash light emission. If the value BV1 is larger than thepredetermined value, that is, the brightness is sufficient, the processproceeds to a step S205. The [ELECTRONIC FLASH POPUP] routine will bedescribed later.

[0234] At the step S205, when the microcomputer CPU determines that theswitch SW2 has been turned on by subjecting the release button, notshown, to the second stroke operation, the process proceeds to a stepS206. If the switch SW2 has not been turned on and at the same time theswitch SW1 is on or if a predetermined period of time (for example, 6sec.) has not elapsed after the switch SW1 was turned on, then theprocess returns to the step S203. After the predetermined period of timehas elapsed, the process proceeds to the [STOP] routine.

[0235] At the step S206, as in the step S202, the microcomputer CPUchecks the power supply voltage. If the voltage is equal to or lowerthan the predetermined level LEVEL1, the process proceeds to the stepS103. If the voltage exceeds the predetermined level LEVEL1, the processproceeds to a step S207.

[0236] At the step S207, the microcomputer CPU rotates the first motorM1 in the first direction, and rotates the cam gears 55 and 57 to clearthe mirror popping-up and shutter charging cancel operations.

[0237] At a step S208, if the microcomputer CPU determines that rotationof the cam gear 55 has set the phase of the phase substrate 61 toprovide the signal indicative of CMSP1: Low, CMSP2: High to therebyindex the phase for cancellation of mirror popping-up and shuttercharging, then the process proceeds to a step S211. If this cannot bedetected within a predetermined period of time (for example, 300 msec.),the process proceeds to a step S209.

[0238] At the step 209, the microcomputer CPU brakes the first motor M1.

[0239] At a step S210, the microcomputer CPU displays a warningindicating that the mirror popping-up operation is disabled, and theprocess then proceeds to the step S999 to execute the [STOP] routine.

[0240] At the step S211, when the signal is established at the stepS208, the microcomputer CPU brakes the first motor M1.

[0241] At a step S212, the microcomputer CPU converts the apex valueobtained at the step S203 into an actual shutter time (actual-timeexpansion).

[0242] The microcomputer CPU then sets the output port PS0 to “L” to cutoff the power supply to the magnet MG1 to start the front curtaintravelling. Thus, the front curtain travels to expose the film.

[0243] Subsequently, the actual shutter time is counted, and once theactual-time counting operation is completed, the microcomputer CPU setsthe output port PS1 to “L” and cuts off the power supply to the magnetMG2 to start the rear curtain travelling. Thus, the rear curtain travelsto complete the exposure of the film.

[0244] When the rear curtain completes traveling and the switch CN2 isturned on, the microcomputer CPU sets the output ports PS0 and PS1 to“H” to supply power to both the magnets MG1 and MG2.

[0245] At this time, when electronic flash light emission is determinedto be required at the step S204 and if the electronic flash unit ST hasbeen popped up to the light emission enabled position, and theelectronic flash popup detecting switch SWSTUP is on, then themicrocomputer CPU sets the shutter time to a shutter tuning time. Oncethe front curtain completes traveling and when the switch X is turnedon, the microcomputer CPU supplies a light emission starting signal tothe electronic flash circuit FLSH through the output port FS to causethe electronic flash to emit light. Then, in response to an output froma dimming circuit, not shown, the microcomputer CPU supplies a lightemission stopping signal to the electronic flash circuit FLSH throughthe output port FO to stop the electronic flash light emission.

[0246] At a step S213, the microcomputer CPU rotates the first motor M1in the first direction, and rotates the cam gears 55 and 57 to performthe mirror popping-down and shutter charging operations.

[0247] At a step S214, if the microcomputer CPU determines that rotationof the cam gear 55 has set the phase of the phase substrate 61 toprovide the signal indicative of CMSP1: High, CMSP2: Low to therebyindex the phase for the completion of mirror popping-down and shuttercharging, then the process proceeds to a step S217. If this cannot bedetected within a predetermined period of time (for example, 300 msec.),the process proceeds to a step S215.

[0248] At the step 215, the microcomputer CPU brakes the first motor M1.

[0249] At a step S216, the microcomputer CPU displays a warningindicating that the mirror popping-down and shutter charging operationsare disabled, and the process then proceeds to the step S999 to executethe [STOP] routine.

[0250] At the step S217, when the signal is established at the stepS208, the microcomputer CPU brakes the first motor M1.

[0251] At a step S218, when the microcomputer CPU determines that thefilm counter shows 0, the process proceeds to the [RELEASE] routine.When the film counter shows a number from 1 to 35, the process proceedsto a [FILM WINDING] routine. When the film counter shows 36, themicrocomputer CPU determines that the photographing on the final framehas been completed, and the process proceeds to a [FILM REWINDING]routine.

[0252] Then, at a step S219, when the switch SW2 is on, the processproceeds to the step S206. When the switch SW2 is not on, the releaseprocess is terminated. The [FILM REWINDING] and [FILM REWINDING]routines will be described later.

[0253] Now, the [FILM WINDING] routine will be described with referenceto FIGS. 17A and 17B.

[0254] At a step S301, as in the steps S102, S202, and S206, themicrocomputer CPU checks the power supply voltage. If the voltage isequal to or lower than the predetermined level LEVEL1, the processproceeds to the step S103. If the voltage exceeds the predeterminedlevel LEVEL1, the process proceeds to a step S303.

[0255] At a step S302, the microcomputer CPU further determines whetheror not the voltage check level is higher than a predetermined valueLEVEL2. If the former is higher than the latter, the microcomputerdetermines that the power supply is in a high voltage state, and theprocess proceeds to the step S303. Otherwise the microcomputer CPUdetermines that the power supply is in a low voltage state, and theprocess proceeds to a step S307.

[0256] At the step S303, the microcomputer CPU determines whether or notthe switching mechanism is in the high-speed winding state shown in FIG.7, based on the phase of the cam gear 38. If the signal indicative ofPOCH1: Low, POCH2: Low is obtained, the process proceeds to a step S311.If this signal is not obtained, the process proceeds to a step S304.

[0257] At the step S304, the microcomputer CPU rotates the second motorM2 in the first direction so as to set the switching mechanism into thehigh-speed winding state shown in FIG. 7E while the first motor M1 isrotating in the second direction.

[0258] At a step S305, if the microcomputer CPU determines that rotationof the cam gear has set the phase of the phase substrate 40 to providethe signal indicative of POCH1: Low, POCH2: Low to thereby set theswitching mechanism into the high-speed state shown in FIG. 7E, then theprocess proceeds to a step S306. If the signal indicative of POCH1: Low,POCH2: Low is not obtained even after the lapse of a predeterminedperiod of time (for example, 1 sec.), the process proceeds to the stepS999 to execute the [STOP] routine.

[0259] At the step S306, when the signal is established at the stepS305, the microcomputer CPU brakes the second motor M2, and the processproceeds to the step S311.

[0260] At a step S307, the microcomputer CPU determines whether or notthe switching mechanism is in the low-speed winding state shown in FIG.8E, based on the phase of the cam gear 38. If the signal indicative ofPOCH1: High, POCH2: Low is obtained, the process proceeds to the stepS311. If this signal is not obtained, the process proceeds to a stepS308.

[0261] At the step S308, the microcomputer CPU rotates the second motorM2 in the first direction so as to set the switching mechanism into thelow-speed winding state shown in FIG. 8E while the first motor M1 isrotating in the second direction.

[0262] At a step S309, if the microcomputer CPU determines that rotationof the cam gear has set the phase of the phase substrate 40 to providethe signal indicative of POCH1: High, POCH2: Low to thereby set theswitching mechanism into the low-speed state shown in FIG. 8E, then theprocess proceeds to a step S310. If the signal indicative of POCH1:High, POCH2: Low is not obtained even after the lapse of a predeterminedperiod of time (for example, 1 sec.), the process proceeds to the stepS999 to execute the [STOP] routine.

[0263] At the step S310, when the signal is established at the stepS309, the microcomputer CPU brakes the second motor M2, and the processproceeds to the step S311.

[0264] At the step S311, the microcomputer CPU rotates the first motorM1 in the second direction to wind the film.

[0265] At a step S312, the microcomputer CPU resets the pulse counter ofthe internal EEPROM which allows the perforations on the film to bedetected.

[0266] At a step S313, the microcomputer CPU sets a predetermined time(for example, high-speed winding: b 150 msec., low-speed winding: 300msec.) to the internal timer.

[0267] At a step S314, as in the steps S119 and S130, if themicrocomputer CPU fails to detect the next perforation within the periodof time clocked by the above timer, that is, the film signal from thephoto reflector 26 fails to change within the period of time clocked bythe internal timer, the process proceeds to a step S315. If the signalchanges within the period of time clocked by the above timer, theprocess proceeds to a step S316.

[0268] At the step S315, the microcomputer CPU brakes the first motorM1. The process then proceeds to the[FILM REWINDING] routine.

[0269] At the step S316, the microcomputer CPU counts up the pulsecounter of the internal EEPROM.

[0270] At a step S317, the microcomputer CPU determines whether or notthe pulse counter of the internal EEPROM has reached 8. If the counterhas not reached 8, the process returns to the step S314. If the counterhas reached 8, the process proceeds to a step S318. In this case, theeight perforations corresponding to one frame of the film are detected.

[0271] At the step S318, the microcomputer CPU brakes the first motorM1. Then, at a step S319, the microcomputer CPU resets the predeterminedtime to the internal timer.

[0272] At a step S320, the microcomputer CPU counts up the film counterof the internal EEPROM, thus completing the winding operation.

[0273] Next, the [ELECTRONIC FLASH POPUP] routine for driving theelectronic flash to pop up to the light emission enabled position willbe described with reference to FIG. 18.

[0274] At a step S401, as in the step S102, the microcomputer CPU checksthe power supply voltage. If the voltage is equal to or lower than thepredetermined level LEVEL1, the process proceeds to the step S103. Ifthe voltage exceeds the predetermined level LEVEL1, the process proceedsto a step S402.

[0275] With the camera of the present embodiment, the photographer canmanually and directly pop up the electronic flash unit ST, so that atthe step S402, the microcomputer CPU determines through the electronicflash popup detecting switch SWSTUP whether or not the electronic flashunit ST has already been popped up to the light emission enabledposition. If the electronic flash unit ST has been popped up to thelight emission enabled position, the microcomputer CPU starts charging amain capacitor in the electronic flash circuit FLSH and then determinesthat the electronic flash popping-up operation has been completed, andthe process then returns to the step S205. If the electronic flash unithas not been popped up to the light emission enabled position yet, theprocess proceeds to the step S403.

[0276] At the step S403, the microcomputer CPU rotates the second motorM2 in the second direction to execute the electronic flash popupdriving.

[0277] At a step S404, the microcomputer CPU rotates the second motor M2until the rotation of the second motor M2 in the second direction causesrotation of the cam gear 71 to perform the operations shown in FIGS. 10Ato 10D so that the signal supplied to the input port STCTL of themicrocomputer CPU from the switch SWSTCTL (leaf switch 72) is switchedfrom High through Low to High. When the signal is switched in thismanner, the process proceeds to a step S407. When the signal is notswitched in the above manner, the process proceeds to a step S405.

[0278] At the step S405, the microcomputer CPU measures the period oftime elapsed from the start of the power supply to the second motor M2.If the measured period of time exceeds a predetermined value (forexample, 500 msec.), the process proceeds to a step S406. If themeasured period of time does not exceed the predetermined value, theprocess returns to the step S404.

[0279] At a step S406, the microcomputer CPU outputs a serial signal tothe display driving circuit DSP through the output port CSDSP to displaya warning indicating that the electronic flash popping-up operation hasbeen unsuccessful. The process then proceeds to the [STOP] routine. At astep S407, the microcomputer CPU brakes the second motor, and theprocess proceeds to a step S408.

[0280] At the step S408, the microcomputer determines through theelectronic flash popup detecting switch SWSTUP whether or not theelectronic flash unit ST has actually been popped up to the lightemission enabled position. If the electronic flash unit ST has beenpopped up to the light emission enabled position (Low), themicrocomputer CPU starts charging the main capacitor and determines thatthe electronic flash propping-up operation has been completed, and theprocess returns to the step S205. On the other hand, if the electronicflash unit ST has not been popped up to the light emission enabledposition (High), the process returns to the step S403 to continuerotating the second motor M2 in the second direction. If the electronicflash popup detecting switch SWSTUP remains High even after threerepetitions of the operations from the rotation of the second motor M2in the second direction (step S403) to the braking (step S407), then theprocess proceeds to the step S406 to perform the display indicating thatthe electronic flash popup operation has been unsuccessul.

[0281] Next, the [FILM REWINDING] routine will be described withreference to FIGS. 19 and 20.

[0282] At a step S501, as in the step S102, the microcomputer CPU checksthe power supply voltage. If the voltage is equal to or lower than thepredetermined level LEVEL1, the process proceeds to the step S103. Ifthe voltage exceeds the predetermined level LEVEL1, the process proceedsto a step S502.

[0283] At the step S502, the microcomputer CPU determines whether or notthe switching mechanism is in the rewinding state shown in FIG. 9C,based on the phase of the cam gear 38, to carry out rewinding of thefilm through rotation of the first motor M1 in the first direction. Ifthe phase of the phase substrate 40 is POCH1: Low, POCH2: High, theprocess proceeds to a step S506. If the former is not the latter, theprocess proceeds to a step S503.

[0284] At the step S503, the microcomputer CPU rotates the second motorM2 in the first direction to rotate the cam gear 38, so as to set theswitching mechanism into the rewinding state shown in FIG. 9C while thefirst motor M1 is rotating in the first direction.

[0285] At a step S504, if the microcomputer CPU determines that rotationof the cam gear has set the phase of the phase substrate 40 to providethe signal indicative of POCH1: Low, POCH2: High to thereby set theswitching mechanism into the rewinding state shown in FIG. 9C, then theprocess proceeds to a step S505. If the signal indicative of POCH1: Low,POCH2: High is not obtained even after the lapse of a predeterminedperiod of time (for example, 1 sec.), the process proceeds to the stepS999 to execute the [STOP] routine.

[0286] At the step S505, when the signal is established at the stepS504, the microcomputer CPU brakes the second motor M2.

[0287] At the step S506, the microcomputer CPU rotates the first motorM1 in the first direction to rewind the film.

[0288] At a step S507, the microcomputer CPU resets the pulse counter ofthe internal EEPROM used to detect the perforations on the film.

[0289] At a step S508, the microcomputer CPU sets 300 msec. to theinternal timer.

[0290] At a step S509, as in the steps S119, S130, and S314, if themicrocomputer CPU fails to detect the next perforation within the periodof time (300 msec.) clocked by the above timer, that is, the film signalfrom the photo reflector 26 does not change within the period of time(300 msec.) clocked by the internal timer, the process proceeds to astep S510. If the signal changes within the period of time (300 msec.)clocked by the above timer, the process proceeds to a step S512.

[0291] At the step S510, the microcomputer CPU brakes the first motorM1. The process then proceeds to a step S511.

[0292] At the step S511, if any error such as jamming of the film occursduring the rewinding of the film, the microcomputer CPU outputs a serialsignal to the display driving circuit DSP through the output port CSDSPto display a warning indicating that the rewinding of the film ismalfunctioning. The process then proceeds to the step S999 to executethe [STOP] routine.

[0293] At the step S512, the microcomputer CPU counts up the pulsecounter of the internal EEPROM.

[0294] At a step S513, the microcomputer CPU determines whether or notthe pulse counter of the internal EEPROM has reached 8. If the counterhas not reached 8, the process returns to the step S508. If the counterhas reached 8, the process proceeds to a step S514. In this case, theeight perforations corresponding to one frame of the film are detected.

[0295] At the step S514, the microcomputer CPU resets the 300 msec. tothe internal timer.

[0296] At a step S515, the microcomputer CPU counts down the filmcounter of the internal EEPROM.

[0297] At a step S516, the microcomputer CPU determines whether or notthe film counter of the internal EEPROM has reached 0. If the counterhas not reached 0, the process returns to the step S508. If the counterhas reached 0, the process proceeds to a step S517. In this case, it isdetected whether or not the film has been rewound for the frames alreadyundergoing photographing.

[0298] At the step S517, the microcomputer CPU brakes the first motor M1upon the lapse of 2 sec. after the film counter reached 0 at the stepS516.

[0299] At a step S518, the microcomputer CPU rotates the second motor M2in the first direction so as to set the switching mechanism into thelow-speed winding state shown in FIG. 8E while the first motor M1 isrotating in the second direction.

[0300] At a step S519, if the microcomputer CPU determines that rotationof the cam gear has set the phase of the phase substrate 40 to providethe signal indicative of POCH1: High, POCH2: Low to thereby set theswitching mechanism into the low-speed winding state shown in FIG. 8E,then the process proceeds to a step S520. If the signal indicative ofPOCH1: High, POCH2: Low is not obtained even after the lapse of apredetermined period of time (for example, 1 sec.), the process proceedsto the step S999 to execute the [STOP] routine.

[0301] At the step S520, when the signal is established at the stepS519, the microcomputer CPU brakes the second motor M2, and the processproceeds to a step S521. In this manner, the switching mechanism is setinto the low-speed winding state shown in FIG. 8E after the film hasbeen rewound and before a new film is loaded.

[0302] At the step S521, the microcomputer CPU outputs a serial signalto the display driving circuit DSP through the output port CSDSP tocarry out a display indicating that the rewinding operation has beencompleted. The process then proceeds to the step S999 to execute the[STOP] routine.

[0303] The above described internal mechanism and camera controloperations are only examples and may be changed arbitrarily.

[0304] Further, in the present embodiment, only the operation of poppingup the electronic flash to the light emission enabled position is drivenby the motor, but the operation of popping down the electronic flash tothe housed position may be driven by a motor.

[0305] Moreover, in the present embodiment, the fifth driving system isused to pop up the electronic flash, but the fifth driving system may beused as other driving systems with lighter driving loads instead of theelectronic flash popup driving system.

[0306] Furthermore, the control flow charts of the present embodimentshow the case in which the film winding speed is switched depending onthe power supply voltage level, but the film winding speed may beswitched depending on environmental conditions (temperature or the like)in which the camera is used, that affect the winding and feeding loadson films used.

What is claimed is:
 1. A driving device provided in an apparatus fordriving a plurality of driving systems by means of motors as drivingsources, comprising: a first motor; first and second planetarymechanisms responsive to rotation of said first motor in a desireddirection, for revolving in a direction corresponding to the desireddirection to transmit a driving force of said first motor; a firstdriving system disposed for engagement with said first planetarymechanism to have the driving force of said first motor transmittedthereto via said first planetary mechanism when said first motor rotatesin a first direction; a second driving system disposed for engagementwith said first planetary mechanism to have the driving force of saidfirst motor transmitted thereto via said first planetary mechanism whensaid first motor rotates in a second direction; a third driving systemdisposed for engagement with said second planetary mechanism to have thedriving force of said first motor transmitted thereto via said secondplanetary mechanism when said first motor rotates in the firstdirection; and a switching mechanism responsive to rotation of saidfirst motor in the desired direction, for switching a transmission pathfor the driving force of said first motor by inhibiting one of saidfirst and second planetary mechanisms from revolving, and for causingthe other of said first and second planetary mechanisms to transmit thedriving force of said first motor through a transmission path selectedby the switching; wherein said first and second planetary mechanismshave first and second restraint members, respectively, for restrainingsaid first and second planetary mechanisms from revolving simultaneouslyby inhibiting concurrence of engagement of said first planetarymechanism with said second driving system and engagement of said secondplanetary mechanism with said third driving system.
 2. A driving deviceas claimed in claim 1, including a fourth driving system disposed tohave the driving force of said first motor transmitted thereto via saidsecond planetary mechanism when said first motor rotates in the seconddirection.
 3. A driving device as claimed in claim 1, including anactuator for driving said switching mechanism to cause said switchingmechanism to switch the transmission path for the driving force of saidfirst motor.
 4. A driving device as claimed in claim 3, wherein saidactuator comprises a second motor having a smaller output than saidfirst motor, the driving device including a third planetary mechanismfor transmitting a driving force of said second motor, and wherein saidswitching mechanism is actuated by the driving force of said secondmotor transmitted through said third planetary mechanism.
 5. A drivingdevice as claimed in claim 3, including a fifth driving system disposedto have a driving force of said second motor transmitted thereto viasaid third planetary mechanism when said second motor rotates in thesecond direction.
 6. A driving device as claimed in claim 1, wherein theapparatus includes a device that performs a predetermined kind ofoperation, and wherein said second driving system and said third drivingsystem cause operations of said device in opposite directions to eachother.
 7. A driving device as claimed in claim 1, wherein said switchingmechanism selectively switches between a state in which said firstplanetary mechanism is permitted to be drivingly connected to said firstdriving system and said second driving system while said secondplanetary mechanism is inhibited from being connected to said thirddriving system and said fourth driving system, a state in which saidfirst planetary mechanism is permitted to be drivingly connected to saidfirst driving system and said second planetary mechanism is permitted tobe drivingly connected to said fourth driving system while said firstplanetary mechanism is inhibited from being connected to said seconddriving system and said second planetary mechanism is inhibited frombeing connected to said third driving system, and a state in which saidsecond planetary mechanism is permitted to be drivingly connected tosaid third driving system while said first planetary mechanism isinhibited from being connected to said first driving system.
 8. Adriving device as claimed in claim 1, including a sun gear memberdisposed to be driven by said first motor, and wherein said first andsecond planetary mechanisms are disposed to revolve around said sun gearmember independently of each other, said first and second planetarymechanisms having respective revolving shafts having bearing portionsand being concentrically arranged, said first and second restraintmembers being provided on said bearing portions.
 9. A camera having aplurality of driving systems driven by means of motors as drivingsources, comprising: a first motor; first and second planetarymechanisms responsive to rotation of said first motor in a desireddirection, for revolving in a direction corresponding to the desireddirection to transmit a driving force of said first motor; a firstdriving system disposed for engagement with said first planetarymechanism to have the driving force of said first motor transmittedthereto via said first planetary mechanism when said first motor rotatesin a first direction; a second driving system disposed for engagementwith said first planetary mechanism to have the driving force of saidfirst motor transmitted thereto via said first planetary mechanism whensaid first motor rotates in a second direction; a third driving systemdisposed for engagement with said second planetary mechanism to have thedriving force of said first motor transmitted thereto via said secondplanetary mechanism when said first motor rotates in the firstdirection; and a switching mechanism responsive to rotation of saidfirst motor in the desired direction, for switching a transmission pathfor the driving force of said first motor by inhibiting one of saidfirst and second planetary mechanisms from revolving, and for causingthe other of said first and second planetary mechanisms to transmit thedriving force of said first motor through a transmission path selectedby the switching; wherein said first and second planetary mechanismshave first and second restraint members, respectively, for restrainingsaid first and second planetary mechanisms from revolving simultaneouslyby inhibiting concurrence of engagement of said first planetarymechanism with said second driving system and engagement of said secondplanetary mechanism with said third driving system.
 10. A camera asclaimed in claim 9, including a fourth driving system disposed to havethe driving force of said first motor transmitted thereto via saidsecond planetary mechanism when said first motor rotates in the seconddirection.
 11. A camera as claimed in claim 9, including a mirrordisposed to advance into and recede from a photographic optical path,and a shutter, and wherein said first driving system comprises a drivingsystem for driving said mirror, and for driving charging of saidshutter, said second and fourth driving systems comprise film windingdriving systems that wind a film at different speeds from each other,and said third driving system comprises a film rewinding driving system.12. A camera as claimed in claim 9, including an actuator for drivingsaid switching mechanism to cause said switching mechanism to switch thetransmission path for the driving force of said first motor.
 13. Acamera as claimed in claim 12, wherein said actuator comprises a secondmotor having a smaller output than said first motor, the cameraincluding a third planetary mechanism for transmitting a driving forceof said second motor, and wherein said switching mechanism is actuatedby the driving force of said second motor transmitted through said thirdplanetary mechanism.
 14. A camera as claimed in claim 12, including anelectronic flash device, and an electronic flash driving system disposedto have a driving force of said second motor transmitted thereto whensaid second motor rotates in the second direction, for causing executionof at least one of an operation of driving said electronic flash deviceto project into a flash light emission enabled position, and anoperation of driving said electronic flash device into a housedposition.
 15. A camera as claimed in claim 9, including a device thatperforms a predetermined kind of operation, and wherein said seconddriving system and said third driving system cause operations of saiddevice in opposite directions to each other.
 16. A camera as claimed inclaim 9, wherein said switching mechanism selectively switches between astate in which said first planetary mechanism is permitted to bedrivingly connected to said first driving system and said second drivingsystem while said second planetary mechanism is inhibited from beingconnected to said third driving system and said fourth driving system, astate in which said first planetary mechanism is permitted to bedrivingly connected to said first driving system and said secondplanetary mechanism is permitted to be drivingly connected to saidfourth driving system while said first planetary mechanism is inhibitedfrom being connected to said second driving system and said secondplanetary mechanism is inhibited from being connected to said thirddriving system, and a state in which said second planetary mechanism ispermitted to be drivingly connected to said third driving system whilesaid first planetary mechanism is inhibited from being connected to saidfirst driving system.
 17. A camera as claimed in claim 9, including asun gear member disposed to be driven by said first motor, and whereinsaid first and second planetary mechanisms are disposed to revolvearound said sun gear member independently of each other, said first andsecond planetary mechanisms having respective revolving shafts havingbearing portions and being concentrically arranged, said first andsecond restraint members being provided on said bearing portions.